Re: [sage-support] Question related to Sagemath permission on Github

On 21 January 2024 12:25:23 GMT, Juan Grados wrote: >I have a question about how you deal with deletion policies in Sagemath. >Specifically, I plan to create a repository with many people involved. This >repo MUST have several admins (who can potentially delete the repo). To >protect the repo

[sage-support] Question related to Sagemath permission on Github

I have a question about how you deal with deletion policies in Sagemath. Specifically, I plan to create a repository with many people involved. This repo MUST have several admins (who can potentially delete the repo). To protect the repo from arbitrary deletion, I need to know if Github allows

[sage-support] Question about cysignals installation

Dear Sage developers, I'm trying to install the cysignals 1.11.2 package in Python 3.9.7 using pip (on a computer with macOS system and Apple M2 chip) and have already installed the prerequisite packages Cython and Sphinx, but still failed with some Cython compiling errors (please see the

[sage-support] Question about solving polynomial system over RR in sage

I would like to solve a polynomial system over RR in sage. See the toy example below >>> var_names = ['xor_0_7_x0', 'xor_0_7_x12', 'xor_0_7_y0'] >>> nvars = 3 >>> R=PolynomialRing(RealField(53), nvars, var_names, order="degneglex") >>> a=R.gens()[0]+R.gens()[1]+R.gens()[2] >>>

Re: [sage-support] question about exercise

Le mercredi 16 septembre 2020 à 23:39:33 UTC+2, rachel...@gmail.com a écrit : > I dont know how to code in python > That may be the point of the exercise, don't you think ? HTH, On Wednesday, September 16, 2020 at 5:27:01 PM UTC-4 dim...@gmail.com wrote: > >> On Wed, Sep 16, 2020 at 10:24

Re: [sage-support] question about exercise

I dont know how to code in python On Wednesday, September 16, 2020 at 5:27:01 PM UTC-4 dim...@gmail.com wrote: > On Wed, Sep 16, 2020 at 10:24 PM Rachel King wrote: > > > > The textbook for a course I am taking says the following, > > Suppose you have three tests in your linear algebra class

Re: [sage-support] question about exercise

On Wed, Sep 16, 2020 at 10:24 PM Rachel King wrote: > > The textbook for a course I am taking says the following, > Suppose you have three tests in your linear algebra class and your scores are > 90, 100, and 98. In the Sage cell below, add your scores together and call > the result total. On

[sage-support] question about exercise

The textbook for a course I am taking says the following, Suppose you have three tests in your linear algebra class and your scores are 90, 100, and 98. In the Sage cell below, add your scores together and call the result total. On the next line, find the average of your test scores and print

[sage-support] Question about a deprecation warning

This puzzles me: evaluating '\i' in Python 3 just gives '\i'. Same with IPython. Evaluating it in Sage prints many warning messages: the following is from a fresh Sage session, and I only evaluated '\i' once, despite the appearance: % sage

[sage-support] Question about upgrading.

Today, I have tried to upgrade from 7.4 to 7.5 (git pull; make ...) I have a problem with the optional package coxeter3 (it does not compile). Before trying to solve this problem with coxeter, I would like to know if there is a canonical way to remove coxeter3 from sage tree to finish the build

Re: [sage-support] Question regarding normalization of modular symbols.

On 9 November 2016 at 00:25, francisco wrote: > Hello, > > I have been computing modular symbols for distinct curves on the Cremona > data base. > But, in a few curves, I recived a WARNING messages like this: > > Warning : Could not normalize the modular symbols, maybe all

[sage-support] Question regarding normalization of modular symbols.

Hello, I have been computing modular symbols for distinct curves on the Cremona data base. But, in a few curves, I recived a WARNING messages like this: Warning : Could not normalize the modular symbols, maybe all further results will be multiplied by -1, 2 or -2. Why sage does not give the

[sage-support] Question about write_lp

Hello, I think there might be a bug in how write_lp handles the objective function. Consider the following simple ILP formulation for signed domination === def signed(G): I = MixedIntegerLinearProgram(maximization=false) x = I.new_variable(binary=True) for u in G:

[sage-support] Question about Boolean Formulas

Dears members, I have two question about the package sage.logic.booleval of SAGE. 1.-In the documentation of that package I have found a similar formula of this "t = ['&', ['|', 'a', 'b'], ['|', 'a', 'c']]". My question is it is posible to write three literals in each clause? 2.-In that

[sage-support] Question about Casting over Finite Field

I have declared the finite Field K and the equation e. How I can cast the equation e to finite field K.? K=GF(2) e = 0==r1405 + 97557948918122409/154603142862411371*r1406 - 26113332388244438/463809428587234113*r1408 + 180996540766820643/154603142862411371*r1409 thanks --

Re: [sage-support] Question about Casting over Finite Field

On Aug 9, 2015, at 13:31 , Juan Grados wrote: I have declared the finite Field K and the equation e. How I can cast the equation e to finite field K.? K=GF(2) e = 0==r1405 + 97557948918122409/154603142862411371*r1406 - 26113332388244438/463809428587234113*r1408 +

[sage-support] Question about Free algebra

Hi everyone, I'm doing this: sage: FreeA.a,b,c,d,e,f = FreeAlgebra(QQ,implementation=letterplace) sage: P = a*b*a*c*c*b + a*b*a*d*d*b + a*c*a*d*d*c + b*c*b*d*d*c sage: X = P.lm() sage: X a*b*a*c*c*b And now I would like a way to cut my element X into two factors of a given size. Something like

[sage-support] Question mark failed on Sage toplevel

Hello everyone, I'm facing an error with the question mark after any kind of function. Here is an error log with 'PolynomialRing' : https://gist.github.com/anonymous/f9adbc3ec08dac0892a6 I cannot access the documentation with '?' but it works with : sage: help(PolynomialRing) I'm running

Re: [sage-support] Question about subs in PolynomialSequence

Hi Juan, I'm trying to use subs method in PolynomialSequence, but when I doing that I get the same PolynomialSequence. For example in code below my polynomial sequence PS has only one polynomial (P) ... I'm trying to use subs but I get the same polynomial. Where is wrong? The thing is that

[sage-support] Question about subs in PolynomialSequence

Dears members, I'm trying to use subs method in PolynomialSequence, but when I doing that I get the same PolynomialSequence. For example in code below my polynomial sequence PS has only one polynomial (P) ... I'm trying to use subs but I get the same polynomial. Where is wrong? reset() from

[sage-support] Question About Finite Field propertie in polynomial ring

Dears members, Let be the field q = 2 K.t = GF(q^n) and the Polynomial Ring PR = PolynomialRing(K,X) Let be a random monomial of PR for example P = t*X^(q^a). Is there any method in sage to reduce X degree of polynomial P, such that equivalent polynomial is t*X^(q^b) where b =

[sage-support] Question about solve_sat

Dear members, I'm trying to solve the attach formulas but I get FALSE, anyone know what means that, or Why I get FALSE? sage: solve_sat(PolynomialSequence(F,RR),n=infinity) False thanks -- - MSc. Juan del Carmen Grados Vásquez

Re: [sage-support] Question about solve_sat

It means that the system is believed to be unsolvable. On Wednesday 27 Aug 2014 13:54:47 Juan Grados wrote: Dear members, I'm trying to solve the attach formulas but I get FALSE, anyone know what means that, or Why I get FALSE? sage: solve_sat(PolynomialSequence(F,RR),n=infinity) False

[sage-support] Question about SAT solver

Dears members, I'm trying to understand why the solver not found solution in this code R.x,y,z,w = BooleanPolynomialRing() S = PolynomialSequence([x*y+z,x+y]) sol = S.solve(); sol [] For me the solution is x=1;y=1 and z=1, or I'm wrong? thanks --

Re: [sage-support] Question about SAT solver

This is a bug. In particular: sage: S.solve(eliminate_linear_variables=False) [{w: 0, z: 0, y: 0, x: 0}] Does the trick. The bug is that eliminating linear variables already solves the problem and the logic in solve() doesn't handle this case. Please open a ticket and CC me. On Tuesday 12 Aug

[sage-support] Question about ortogonal subspaces

Dears members, I trying to solve the next problem. Let be the chain of subspaces J1 \subset J2 \subset J3 \subset J4 over the finite field GF(3), where dim(J1) = 2, dim(J2) = 4, dim(J3) = 6 and dim(J4)=8. I want extract the basis vector of the subspace J4-J3, J3-J2 and J2-J1. For J4-J3 I get

[sage-support] question about hg (newbie)

I install sage in ubuntu using the following commands: $apt-add-repository -y ppa:aims/sagemath $apt-get update $apt-get install sagemath-upstream-binary I run sage and gave sage: hg_sage.status() NameError Traceback (most recent call last)

Re: [sage-support] question about hg (newbie)

Hi Ketch, What version of Sage have you installed? I ask because Sage has since v6.0 moved to using GIT for version control... --Kannappan. On Mon, May 12, 2014 at 1:12 AM, J.A. Ketch jketch12...@gmail.com wrote: I install sage in ubuntu using the following commands: $apt-add-repository -y

Re: [sage-support] question about hg (newbie)

On Monday, May 12, 2014 6:48:24 AM UTC-4, KnS wrote: Hi Ketch, What version of Sage have you installed? I ask because Sage has since v6.0 moved to using GIT for version control... --Kannappan. And more importantly, where did you find documentation still using hg? That will work fine

Re: [sage-support] question about hg (newbie)

thank you all for the answers the version of my sage is : Sage Version 6.1.1, Release Date: 2014-02-04, so I can not use hg. Some sites for the development refers to hg and not to git. For instance http://combinat.sagemath.org/doc/thematic_tutorials/tutorial-how-to-contribute.html, but is old.

[sage-support] question

Is anyone there? I am trying to get sage to understand latex input. I get an error saying that pdflatex is not installed. How do I do this on a Mac? I have texlive and texshop installed. -Walter Wilcox -- You received this message because you are subscribed to the Google Groups

Re: [sage-support] question

On Mon, Mar 24, 2014 at 10:05 AM, Wilcox, Walter walter_wil...@baylor.edu wrote: Is anyone there? I am trying to get sage to understand latex input. I get an error saying that pdflatex is not installed. How do I do this on a Mac? I have texlive and texshop installed. I'm not sure what you

Re: [sage-support] Question about FastFourierTransform

On Tue, May 28, 2013 at 10:46 AM, Thierry Dumont tdum...@math.univ-lyon1.fr wrote: Hi, I am experimenting with fast Fourier Transform in Sage. It seems there are different possibilities. 1) There is: FastFourierTransform FastFourierTransform(size, base_ring=None) 2) One can simply do: v =

[sage-support] Question on Partitions/Compositions/IntegerVectors

Suppose I want to generate partitions that are in an arithmetic progression with a particular step size...seems straightforward enough, so I just set max_slope and min_slope to that step size. Is this interpretation correct? Ps=Partitions(11,max_slope=-1, min_slope=-1) print Ps.cardinality()

[sage-support] Question about MPI4PY + SAGE

Dears members, I want know if SAGE, used with mpi4py, support distribuited programming i.e distruited memory for example ... atte Juan -- You received this message because you are subscribed to the Google Groups sage-support group. To post to this group, send email to

[sage-support] Question about sage-5.1-linux-64bit-ubuntu_8.04.4_lts-x86_64-Linux.tar.gz

Any one knows if * sage-5.1-linux-64bit-ubuntu_8.04.4_lts-x86_64-Linux.tar.gz*http://sagemath.c3sl.ufpr.br/linux/64bit/sage-5.1-linux-64bit-ubuntu_8.04.4_lts-x86_64-Linux.tar.gz precompiled binaries needs the libc6 version 2.14 to run? I'm using Debian Testing and the (latest) version avaible

[sage-support] Question

Dears members, How I will can get the coefficients list in Fraction Field. When I write p.lis() i obtained this message: 'FractionFieldElement_1poly_field' object has no attribute 'list' -- - MSc. Juan del Carmen Grados

[sage-support] Question about sorted

Hi Everybody, I want sort in lexicographic order a binary strings (numpy array), I can use sorted function? best regards -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more

[sage-support] Question about representation GF

Dears members. Give F.a = GF(2^self.m,modulus=a^4+a+1); and let p(X), g(X) belong F[X], I want know, if is there any function to obtain the xgcd of p(X) and g(X), but when these are in log representation? thanks -- To post to this group, send email to sage-support@googlegroups.com To

[sage-support] Question about plot

Dears members I need axes_labels in vertical and horizontal form in side sideways od axis, how make this?. example http://www.personal.psu.edu/egp11/Eric_Paterson/Blog/Entries/2009/11/18_Open-Source_alternatives_for_MATLAB_in_teaching_and_research_files/ericPlot.jpg #P is list_plot tipe

[sage-support] Question about polynomials roots

Dears members I am have a p(X) belong F[X], where F is a Galois Field. In sage i have a roots() function, I want know please, What is a algorithm used for implement this function?. thanks. -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group,

Re: [sage-support] Question about polynomials roots

Have you read the documentation? It's massive as I just found out: sage: F = GF(3) sage: P.x = F[] sage: p = P.random_element() sage: p.roots? Or check the source: sage: p.roots?? On Saturday 03 Mar 2012, juaninf wrote: Dears members I am have a p(X) belong F[X], where F is a Galois Field.

Re: [sage-support] Question about polynomials roots

My question is for the support algorithm, for example: Chien, Berlekamp-Trace ... etc 2012/3/2 Martin Albrecht martinralbre...@googlemail.com Have you read the documentation? It's massive as I just found out: sage: F = GF(3) sage: P.x = F[] sage: p = P.random_element() sage: p.roots? Or

[sage-support] Question about QuadraticForm polynomial method.

When I run: sage: q = QuadraticForm(ZZ,2,[3,2,5]) sage: q.polynomial() 6*x0^2 + 4*x0*x1 + 10*x1^2 I would expect to get half of this result, which is the quadratic form as a polynomial. The doc tests say this is what the behavior should be, but I don't understand why. Is this actually the

Re: [sage-support] Question about QuadraticForm polynomial method.

On Feb 24, 2012, at 08:04 , Jacob Hicks wrote: When I run: sage: q = QuadraticForm(ZZ,2,[3,2,5]) sage: q.polynomial() 6*x0^2 + 4*x0*x1 + 10*x1^2 I would expect to get half of this result, which is the quadratic form as a polynomial. The doc tests say this is what the behavior should

Re: [sage-support] Question about QuadraticForm polynomial method.

Justin, I don't think that is the issue here: you are referring to the debate between using a,2*b,c as coefficeints rather than a,b,c. But here *all* the coefficients have been doubled. Note that we also have sage: BinaryQF([1,2,3]) x^2 + 2*x*y + 3*y^2 john On 24 February 2012 16:04, Jacob

Re: [sage-support] Question about QuadraticForm polynomial method.

On Feb 24, 2012, at 09:49 , John Cremona wrote: I don't think that is the issue here: you are referring to the debate between using a,2*b,c as coefficeints rather than a,b,c. But here *all* the coefficients have been doubled. I haven't looked at this code in detail yet, but I'm pretty sure

Re: [sage-support] Question about plot

Jason Grout idea is good for me, but I need empiler several plots, i after use show(plot1+plot2+...). How do this?. 2012/2/24 Dan Drake dr...@kaist.edu On Fri, 24 Feb 2012 at 01:39AM -0200, Juan Grados wrote: I need smooth line, (interpolation the points), line(vec) plot line without smoth

[sage-support] Question about plot

Dear members I am a two-tuple vector, vet=[(1,2),(3,4),(5,6),..], i want plot this data with a line aproximation, (interpolation this points), exist any parameter in list_plot function for this. Juan -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from

Re: [sage-support] Question about plot

I am a two-tuple vector, vet=[(1,2),(3,4),(5,6),..], i want plot this data with a line aproximation, (interpolation this points), exist any parameter in list_plot function for this. Maybe line(vet) does what you want? You can look at

Re: [sage-support] Question about plot

I need smooth line, (interpolation the points), line(vec) plot line without smoth 2012/2/24 D. S. McNeil dsm...@gmail.com I am a two-tuple vector, vet=[(1,2),(3,4),(5,6),..], i want plot this data with a line aproximation, (interpolation this points), exist any parameter in list_plot

Re: [sage-support] Question about plot

On Fri, 24 Feb 2012 at 01:39AM -0200, Juan Grados wrote: I need smooth line, (interpolation the points), line(vec) plot line without smoth If a regression line is good enough, see: http://markmail.org/message/lipt7edldscsaaqb (another one of Jason's messages!) Dan -- --- Dan Drake -

[sage-support] Question about perfomance

Dear members. is there a way to know how much is lost, in computing time, using python instead of C/ansi to program an algorithm? -- - Juan del Carmen Grados Vásquez Laboratório Nacional de Computação Científica Tel: +55 24

Re: [sage-support] Question about perfomance

On Sun, Feb 19, 2012 at 11:24 AM, Juan Grados juan...@gmail.com wrote: Dear members. is there a way to know how much is lost, in computing time, using python instead of C/ansi to program an algorithm? It depends entirely on the algorithm and what that algorithm uses from Python/Sage. The

Re: [sage-support] Question about perfomance

William thanks for your answer, this information where I can read? ... I'm doing a good job and I would reference it 2012/2/19 William Stein wst...@gmail.com On Sun, Feb 19, 2012 at 11:24 AM, Juan Grados juan...@gmail.com wrote: Dear members. is there a way to know how much is lost, in

[sage-support] Question about rdtsc()

Dear members Exist any function in SAGE with same goal of rdtsc() in C?. For example: tmp_ini = rdtsc() ... instructions .. ... tmp_dec = rdtsc() - tmp_ini; -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to

Re: [sage-support] Question about cycles per second in SAGE

On Wednesday, February 15, 2012 7:12:20 AM UTC+1, juaninf wrote: sorry, the measure is cycles/byte. sorry again, how obtain this measure in SAGE? I am a bit confused, what is cycles/byte? It would really help if you could expand this to a full example and explain us in detail what you

[sage-support] Question about UniqueFactory

Here is a small example that illustrates my question: http://pastebin.com/GmPhFmT6 Why doesn't this print True? I believe the answer has something to do with the version of sage. If you access G1._factory_data or G2._factory_data you get: (class '__main__.UniqueGraphFactory', (4, 8), (2, (1,

Re: [sage-support] Question about cycles per second in SAGE

On 14 February 2012 03:40, juaninf juan...@gmail.com wrote: Hi everybody. Exists any command in SAGE to get the spent cpu-cycles per second in SAGE? What do you mean by spent cycles per second? Time must be measured in seconds, not inverse seconds, so I assume you don't mean time. I

[sage-support] Question about download SAGE

Hi everybody Please I want download the SAGE math for fedora-32bits, but i need the file with extension *.tar not tar.lzmaa, because my tar program no have support fot this extension, ... http://ftp.iitm.ac.in/sage/linux/32bit/index.html. You know where are url? to download this, (without

Re: [sage-support] Question about cycles per second in SAGE

sorry, the measure is cycles/byte. sorry again, how obtain this measure in SAGE? 2012/2/14 David Kirkby david.kir...@onetel.net On 14 February 2012 03:40, juaninf juan...@gmail.com wrote: Hi everybody. Exists any command in SAGE to get the spent cpu-cycles per second in SAGE? What do

[sage-support] Question about cycles per second in SAGE

Hi everybody. Exists any command in SAGE to get the spent cpu-cycles per second in SAGE? -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at

[sage-support] Question about scoping

I'm confused by the fact that variables defined inside functions can leak out and become global variables. Here's what I've noticed. (1) I create a file called steiner.py for finding the Steiner point given three points in the plane. Here's my code: def dist(p,q): Eulidean distance

[sage-support] Question about minimal polynomial to build GF

Hi everybody I want choose different minimal polynomial to build a Galois Field 2^m, how? For example: m = 8 sageF.a=GF(2^8) sage:print a.minpoly() I get ... x^8 + x^4 + x^3 + x^2 + 1 but I want now other polynomial for example x^8+x^7+x^4+x^3+x+1 How? thanks -- To post to this group, send

[sage-support] Question about MPI and SAGE

Dears I want create a new datatype, sage.rings.polynomial.polynomial_zz_pex.Polynomial_ZZ_pEX, to use comm.Reduce method, comm.Reduce([PROD,sage.rings.polynomial.polynomial_zz_pex.Polynomial_ZZ_pEX], [RESUL,sage.rings.polynomial.polynomial_zz_pex.Polynomial_ZZ_pEX],op=MPI.SUM, root=0) how i can

Re: [sage-support] Question about Groener Basis

On Thursday 13 October 2011, juaninf wrote: I want implement a efficient linear solve system over GF(2) (and too parallel if this is posible), Hi, are you talking about sparse or dense systems? i reading this article, but i dont understand

Re: [sage-support] Question about sagenb.org

No. Also note that sagenb.org is on a single computer shared among tens of thousands of users, so if you want to do something computationally expensive you're better of installing Sage on your own hardware. On Tue, Oct 11, 2011 at 8:38 AM, juaninf juan...@gmail.com wrote: Exist sagenb.org with

Re: [sage-support] Question about sagenb.org

yes I trying but ... http://groups.google.com/group/sage-support/browse_thread/thread/b581f46aad988472# 2011/10/12 Robert Bradshaw rober...@math.washington.edu No. Also note that sagenb.org is on a single computer shared among tens of thousands of users, so if you want to do something

Re: [sage-support] Question about sagenb.org

help me please 2011/10/12 Juan Grados juan...@gmail.com yes I trying but ... http://groups.google.com/group/sage-support/browse_thread/thread/b581f46aad988472# 2011/10/12 Robert Bradshaw rober...@math.washington.edu No. Also note that sagenb.org is on a single computer shared among

[sage-support] Question about Groener Basis

I want implement a efficient linear solve system over GF(2) (and too parallel if this is posible), i reading this article, but i dont understand http://ask.sagemath.org/question/467/solve-large-system-of-linear-equations-over-gf2 please I like please a example how, make this? for example with

[sage-support] Question about sagenb.org

Exist sagenb.org with openmpi module? -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL:

[sage-support] Question about Kernel Matrix

Hi everyone I want know if exist a parallel implementation to kernels of matrices with openmpi in sage thanks -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit

[sage-support] Question about legend place in plot

Dears I am having a problem with legend place in plot please see this URL http://juaninf.blogspot.com/2011/10/pronto-comparacion-de-algoritmos-para.html I want that legend is in left side, ... how? -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this

Re: [sage-support] Question about legend place in plot

I want that legend is in left side, ... how? Try something like: p = plot(sin,legend_label=sin) p.set_legend_options(loc='upper left') p.show() After making some plot p, you can type help(p.set_legend_options) to see more information about the various things you can configure. Doug -- To

Re: [sage-support] Question about legend place in plot

thanks 2011/10/10 D. S. McNeil dsm...@gmail.com I want that legend is in left side, ... how? Try something like: p = plot(sin,legend_label=sin) p.set_legend_options(loc='upper left') p.show() After making some plot p, you can type help(p.set_legend_options) to see more information

[sage-support] Question about Convert Polynomial

Hi everyone I have two polynomial p,q, when I make sage:print polynomial, type(polynomial) get a*X type 'sage.rings.polynomial.polynomial_zz_pex.Polynomial_ZZ_pEX' X^4 + (a + 1)*X^3 + (a^3 + a)*X^2 + a*X + 1 class 'sage.rings.fraction_field_element.FractionFieldElement_1poly_field' I want

[sage-support] Question about Plot

Hi everyone I am have 4 vectors, and I want plot 2 graphics in the same place, vector1 vs vector2 color = red vector3 vs vector4 color = yelow How? please help me, -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to

[sage-support] Question about eclipse + pydev + sage

Hi everyone I want use eclipse + pydev IDE for SAGE, I see this https://groups.google.com/forum/#!topic/sage-support/HTPssIMKMHw/discussion I got set sage-python as interpreter, but when run the *. sage, it returns Error File / home/juaninf/workspace/goppa1/src/test.sage, line 28 F. x = GF

Re: [sage-support] Question about xgcd method

fixed 2011/9/30 juaninf juan...@gmail.com Hi everybody, I want implement a modified extend Euclidean Algorithm, (egcd function), but this give wrong results, below my egcd, please help me to fix ... def egcd(p1,p2): if p2 == PR(0): return (p1,1,0) else: (q1, r1) =

[sage-support] Question About Primitive Element

Phi(z) since by in your example the reduction of z will be primitive by definition. -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at

[sage-support] Question about congruence

How do a(x) congruence b(x)R(x) mod (g(x)) in sage? thanks by your answers -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at

[sage-support] Question about xgcd method

Hi everybody, I want implement a modified extend Euclidean Algorithm, (egcd function), but this give wrong results, below my egcd, please help me to fix ... def egcd(p1,p2): if p2 == PR(0): return (p1,1,0) else: (q1, r1) = (p1).quo_rem(p2) (d,s1,t1) = egcd(p2, r1)

[sage-support] Question About Primitive Element

Hi How I will get a primite element ... F = GF(2) PRF.z = PolynomialRing(F); print PRF Phi = PRF.quotient(z^4+z+1); Phi.primitive_element() . ? -- - Juan del Carmen Grados Vásquez Laboratório Nacional de

Re: [sage-support] Question about Patterson Algorithm Implementation

This is definitely not a bug.   The definition of the _add_ method absolutely demands that both inputs have exactly the same parent.  In the above instance, the left hand input (=1) has parent ZZ, and the right hand input (=SR(2)) has parent the symbolic ring. Yeah, I know that-- it's the

Re: [sage-support] Question about Patterson Algorithm Implementation

Hi thanks for your answers, I used _inverter_, _mul_, _add_ etc, because apparently the implementation work fine but only apparently, i think that the essencial problem is with _invert_ method, but now I used inverse_mod , but I dont where are the error, I implemented Berlekamp Algorithm too,

Re: [sage-support] Question about Patterson Algorithm Implementation

in the end line print sigma.roots(), always give empty vector, here sigma.roots() should nonzero vector 2011/9/28 Juan Grados juan...@gmail.com Hi thanks for your answers, I used _inverter_, _mul_, _add_ etc, because apparently the implementation work fine but only apparently, i think

Re: [sage-support] Question about Patterson Algorithm Implementation

help please! 2011/9/28 Juan Grados juan...@gmail.com in the end line print sigma.roots(), always give empty vector, here sigma.roots() should nonzero vector 2011/9/28 Juan Grados juan...@gmail.com Hi thanks for your answers, I used _inverter_, _mul_, _add_ etc, because apparently

Re: [sage-support] Question about Patterson Algorithm Implementation

Hi David, Yes I understand, but now I think that have a logic problem in algorithm, but I don't know where ... i copying lines from [Ict2011], ... 2011/9/28 David Joyner wdjoy...@gmail.com On Wed, Sep 28, 2011 at 5:58 PM, Juan Grados juan...@gmail.com wrote: help please! They did seem to

Re: [sage-support] Question about Patterson Algorithm Implementation

I have already sent, but I dont answer ... because I expect please only if anyelse can help me iff a time ... 2011/9/28 David Joyner wdjoy...@gmail.com On Wed, Sep 28, 2011 at 6:12 PM, Juan Grados juan...@gmail.com wrote: Hi David, Yes I understand, but now I think that have a logic

[sage-support] Question about Patterson Algorithm Implementation

Hi everybody, I am implement Patterson Algorithm for Goppa code, I am copying lines from paper How SAGE helps to implement Goppa Codes and McEliece PKCSs [attach], and my test is a random vector . the error are in Line 77, I expect get roots from \sigma (locator polynomial), but implementation

Re: [sage-support] Question about Patterson Algorithm Implementation

I don't think you should need to call _add_, but this looks like a bug to me: -- | Sage Version 4.7.1, Release Date: 2011-08-11 | | Type notebook() for the GUI, and license() for information.|

Re: [sage-support] Question about Patterson Algorithm Implementation

On Tue, Sep 27, 2011 at 7:15 PM, D. S. McNeil dsm...@gmail.com wrote: I don't think you should need to call _add_, but this looks like a bug to me: -- | Sage Version 4.7.1, Release Date: 2011-08-11                       | |

[sage-support] question about radical

Hum... [radical(k) for k in [1..30]] produces the expected list however [radical(k) for k in range(1,31)] rises an error AttributeError: 'int' object has no attribute 'factor' Wouldn't it be nice if the 2nd comprehension also give the desire list? Any reason why shouldn't SAGE take that? --

Re: [sage-support] question about radical

Hi, On Aug 17, 2011, at 00:20 , pong wrote: [radical(k) for k in [1..30]] produces the expected list however [radical(k) for k in range(1,31)] rises an error AttributeError: 'int' object has no attribute 'factor' The problem here is the distinction between Python 'int's and Sage

[sage-support] question on integration of piecewise related function

Hello, Sage groups, I have a problem, please see the example below, I wonder anyone can help me solve this problem: f = Piecewise([[(0,pi/2),-1],[(pi/2,pi),2]]) a=pi*integrate(f,x,0,pi) a.show() b=pi*integrate(sin(x),x,0,pi) b.show() integrate(f*sin(x),x,0,pi)

[sage-support] question about creating homomorphisms

Hi list i need to construct two morphisms f:ZZ^n \to Z given by a diagonalmatrix and g: ZZ - Z/dZ because I have to find the kernel of the compositoin. consturcting g was no problem by g = ZZ.hom(ZZ.quotient(ZZ.ideal(d))) father, getting the kernel of f as matrix worked too. but how to get the

Re: [sage-support] question about creating homomorphisms

On Tue, Aug 2, 2011 at 12:21 PM, Johannes dajo.m...@web.de wrote: Hi list i need to construct two morphisms f:ZZ^n \to Z given by a diagonalmatrix and g: ZZ - Z/dZ because I have to find the kernel of the compositoin. consturcting g was no problem by g = ZZ.hom(ZZ.quotient(ZZ.ideal(d)))

Re: [sage-support] Question about polynomial rings and their fraction fields

On Fri, Sep 24, 2010 at 6:56 PM, kcrisman kcris...@gmail.com wrote: If I make a polynomial ring using sage: b = PolynomialRing(ZZ, 'x') I get some odd behavior.  Namely, sage: bool(b(x)==x) True sage: b(x) x sage: type(b(x)) something about element of the ring sage: type(x) symbolic

Re: [sage-support] Question about polynomial rings and their fraction fields

On Fri, 24 Sep 2010 18:56:14 -0700 (PDT) kcrisman kcris...@gmail.com wrote: sage: a = FractionField(PolynomialRing(ZZ, 'x')) sage: a(1/x) weird error that seems to imply it has not coerced x to the polynomial ring Did I do something wrong, or is this a bug? Because of the initial

[sage-support] Question about polynomial rings and their fraction fields

If I make a polynomial ring using sage: b = PolynomialRing(ZZ, 'x') I get some odd behavior. Namely, sage: bool(b(x)==x) True sage: b(x) x sage: type(b(x)) something about element of the ring sage: type(x) symbolic expression This isn't really that odd, but still I don't know whether it is

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