If you run `jupyter --paths` and `sage -sh <<<"jupyter --paths"` you see
the difference in paths. The relevant ones for you are probably the
sage-specific ones
$SAGE-LOCAL/var/lib/sage/venv-python3.10/share/jupyter
Whatever is there will get picked up by sage's jupyter but, naturally, not
by
On Monday 18 March 2024 at 06:45:17 UTC-7 Hellen Colman wrote:
"A graph represents an *antisymmetric relation* if ... "
It is not saying a graph is antisymmetric, but is introducing a new
definition of antisymmetric relation.
Ah, indeed! The person must have been interested in transitive
On Friday 15 March 2024 at 15:08:34 UTC-7 Hellen Colman wrote:
Let me just clarify the main point of his question just in case we can
still obtain a helpful answer. Essentially the question is: Why is Sage
calling "antisymmetric" to a property that is not the standard
antisymmetric property?
On Friday 15 March 2024 at 12:42:49 UTC-7 kcrisman wrote:
Or rather, should the default be useoffset False?
Yes, I think that would be reasonable to do. Clearly, offsets being used
without the user knowing they exist can easily lead to confusion and
misinterpreting the graph, as had been
I get the impression that without setting ymin,ymax you just end up with a
tiny range for the y-axis and its labelling is just very weird. I think the
labels displayed are shifted and scaled. So the error is just how the
labels are printed. That looks the same as
On Sunday 21 January 2024 at 04:25:42 UTC-8 Juan Grados wrote:
To protect the repo from arbitrary deletion, I need to know if Github
allows adding a rule to avoid a repository being deleted by a single
person.
If you encourage a workflow with forks and pull requests then everybody
will have
The documented effect is usually of most impact:
https://maxima.sourceforge.io/docs/manual/maxima_46.html#index-domain
there may be other undocumented effects, but the one above tends to explain
a lot already.
On Sunday 3 December 2023 at 06:26:20 UTC-8 Oscar Benjamin wrote:
> What does "set
(side note: Q is generally considered a PID, but indeed it makes little
sense worrying about Smith normal form over it)
Concerning the slow performance: from the documentation,
R._matrix_smith_form would allow an optimized routine to kick in. That
doesn't exist, though.
ZZ doesn't have it
On Monday, 30 October 2023 at 00:19:47 UTC+13 Kwankyu wrote:
What is your code?
P2. = ProjectiveSpace(QQ, 2)
f = 2*x^5 - 4*x^3*y*z + x^2*y*z^2 + 2*x*y^3*z + 2*x*y^2*z^2+ y^5
C = Curve(f)
kC = C.function_field()
D = kC(kC.base_field().gen(0)).differential().divisor()
L,m,s =
On Monday, 30 October 2023 at 00:26:55 UTC+13 G. M.-S. wrote:
If I understand you correctly, SageMath is a bit loose at the moment about
its categories.
That's not what I meant also not what is indicated by what I noticed: by
the looks of it, sage does know about euclidean domains and has
On Saturday, 28 October 2023 at 18:50:12 UTC-7 Nils Bruin wrote:
On Saturday, 28 October 2023 at 15:26:35 UTC-7 Kwankyu wrote:
f1, f2, f3 are univariate polynomials (say in y) over rational function
field (say in x). Then x and y are not always the variables X and Y of the
coordinate ring
On Saturday, 28 October 2023 at 15:26:35 UTC-7 Kwankyu wrote:
f1, f2, f3 are univariate polynomials (say in y) over rational function
field (say in x). Then x and y are not always the variables X and Y of the
coordinate ring of the affine plane. Things are more complicated if the
curve is in
On Saturday, 28 October 2023 at 05:39:26 UTC-7 Kwankyu wrote:
I looked the Magma code in ask.sagemath. There's no problem in computing a
canonical divisor for the curve (through the attached function field).
Computing a basis of the Riemann-Roch space is no problem as well. Actually
the hard
ee
ZZ-modules of rank 1 would also get you the right behaviour.
Guillermo
On Sat, 28 Oct 2023 at 18:44, Nils Bruin wrote:
I'm sure its omission is just an oversight. For fractional ideals in number
fields it is defined:
sage: K.=QuadraticField(7)
sage: I=K.fractional_ideal(5)
sage
I'm sure its omission is just an oversight. For fractional ideals in number
fields it is defined:
sage: K.=QuadraticField(7)
sage: I=K.fractional_ideal(5)
sage: J=K.fractional_ideal(3)
sage: I.intersection(J)
Fractional ideal (15)
I doubt that just knowing a ring is a PID makes computing
On Friday, 27 October 2023 at 15:42:24 UTC-7 Nils Bruin wrote:
It doesn't look like we quite have computation of Riemann-Roch spaces
natively in sage yet
Correction, that DOES seem to be implemented as well:
sage: kC=C.function_field()
sage: D=kC(kC.base_field().gen(0)).differential().divisor
A canonical divisor is the divisor of any differential on C so the
following does the trick:
sage: kC=C.function_field()
sage: kC(kC.base_field().gen(0)).differential().divisor()
It doesn't look like we quite have computation of Riemann-Roch spaces
natively in sage yet, so finding effective
On Thursday, 26 October 2023 at 16:03:27 UTC-7 Eric Majzoub wrote:
I would like to debug the latex printing of an expression that ambiguous.
To reproduce it:
t = var('t')
x = function('x')(t)
latex( diff(x,t)^2 )
This produces ambiguous output, essentially:
partial_t x^2
instead of
I think it was written elsewhere that cysignals has not been ported to
cython 3.0.0 yet. In fact, sage as a whole hasn't been upgraded to compile
with cython 3.0.0 yet.
On Wednesday, 16 August 2023 at 06:57:05 UTC-7 JC wrote:
> Dear Sage developers,
>
> I'm trying to install the cysignals
Perhaps superfluously: the reason why redefining `Integer` (in your example
through "from sympy import *") can break a command in sage that does not
seem to involve `Integer`:
sage: preparse("K = CyclotomicField(32)")
'K = CyclotomicField(Integer(32))'
Due to Sage's preparser, any use of
This response is very much in the "new direction or place to search"
category.
Sagemath's build process has been undergoing quite some changes. It used to
be the case that sage-the-distribution kept virtually everything in-house,
so that an install on shared folder would work great on a
On Monday, 19 June 2023 at 12:10:49 UTC+2 ayan.mah...@gmail.com wrote:
Another crazy thing is that suppose I see 40% usage in memory and kill the
program by cntrl-c but keep sage running. Then I start a new process in
sage. The memory increases from 40%. As if there is some permanent stuff
On Thursday, 1 June 2023 at 07:29:27 UTC-7 Luis Finotti wrote:
I am not sure I will miss them (and other packages that depended on it --
fflas-ffpack libgivaro-dev libgivaro9 liblinbox-dev python3-brial
python3-sage), but isn't there a way to force Jupyter to use Sage's one?
I don't think
On Wednesday, 31 May 2023 at 18:14:59 UTC-7 Luis Finotti wrote:
Here is one with your suggested change:
https://web.math.utk.edu/~finotti/misc/jl1.out
Here is one with the original version:
https://web.math.utk.edu/~finotti/misc/jl2.out
the line:
calling init:
On Tuesday, 30 May 2023 at 06:09:23 UTC-7 Luis Finotti wrote:
I looked at it, but I cannot tell if it is really the same issue, or how I
could check.
well ... it looks like the symbol that is found undefined is indeed of the
type mentioned there. So that would suggest that indeed a system
On Monday, 29 May 2023 at 10:51:27 UTC-7 Luis Finotti wrote:
Any ideas on how to fix it? Is it just me, or a bug with version 10.0? I
followed the same steps I've always followed:
On Monday, 29 May 2023 at 07:39:33 UTC-7 Luis Finotti wrote:
ImportError: /home/finotti/src/sage-10.0/src/sage/matrix/
matrix_modn_dense_float.cpython-311-x86_64-linux-gnu.so: undefined symbol:
_ZNK6Givaro7IntegercvNSt7__cxx1112basic_stringIcSt11char
_traitsIcESaIcEEEB5cxx11Ev
Any ideas on
On Wednesday, 3 May 2023 at 08:58:35 UTC-7 Nils Bruin wrote:
However, be careful:
sage: A=matrix(RR,2,2,[1,2,3,4])
sage: parent(A).is_exact()
True
because matrix rings presently aren't aware of inexactness of their base
rings.
This is something that is considered a bug; see
https
On Wednesday, 3 May 2023 at 08:21:39 UTC-7 G. M.-S. wrote:
Related to a recent discussion, is there a (simple) way to find whether an
expression contains non exact explicit numbers?
For symbolic expression you should probably walk the entire expression tree.
For sage objects, examining the
On Wednesday, 3 May 2023 at 08:11:25 UTC-7 G. M.-S. wrote:
This gives an error:
sage: '' *in* CC
[…]
^
SyntaxError: invalid syntax
It looks like this error comes from the fact that "eval('')" raises this.
Apparently an empty string is not valid python for the parser. It is a
Nice work!
For saving images of 3d-pictures: In the jupyter notebook with the
"threejs" viewer you can click on the "i" in the lower right corner. That
gets you a menu from which you can "sage as png". It will save a snapshot
of what you're viewing. You can also get camera and viewpoint from
On Wednesday, 29 March 2023 at 13:46:04 UTC-7 Matthias Koeppe wrote:
On Wednesday, March 29, 2023 at 1:33:07 PM UTC-7 Nils Bruin wrote:
$ sage --help
...
Sage-the-distribution options:
--optional -- list all optional packages that can be installed
--experimental -- list all
On Wednesday, 29 March 2023 at 13:06:25 UTC-7 Matthias Koeppe wrote:
On Tuesday, March 28, 2023 at 10:18:23 PM UTC-7 Nils Bruin wrote:
[...] leads me to believe that it's probably nor possible to install
pynormaliz via "make" in a binary distribution.
If you install Sage fro
On Tuesday, 28 March 2023 at 21:06:26 UTC-7 Matthias Koeppe wrote:
On Monday, March 27, 2023 at 6:34:50 PM UTC-7 Nils Bruin wrote:
In my experience, sagelib needs rebuilding to interface with normaliz (I
think it's "make normaliz pynormaliz" nowadays, or perhaps one needs a pi
On Monday, 27 March 2023 at 17:47:54 UTC-7 Isuru Fernando wrote:
We used to have separate architecture specific builds, but `sage` is now a
meta-package that is architecture neutral (i.e. noarch).
So, you get sage-9.8 for all architectures. We support sage-9.8 for the
following OS and
What would the current (Spring 2023) easiest instructions be for people to
install sage? I'm asking in support of an install-fest for students, so the
objective is to have easy solutions for giving students access on whatever
platform they have available.
I know about cloud-based solutions, so
On Saturday, 11 February 2023 at 01:51:47 UTC-8 Dima Pasechnik wrote:
>
>make -j8 normaliz pynormaliz
>
> "sage -i" is obsolete - at least in my mind :-)
OK -- thanks! so what used to be "spkg"s are now makefile targets. That
reduces the possibility of having "third party" spkgs -- I guess
On Tuesday, 7 February 2023 at 09:56:06 UTC-8 Dima Pasechnik wrote:
> I don't think setting MAKE is a good idea.
>
> Did you try simply
>
> make -j8 build
This actually causes a bit of a problem when you want to install additional
packages, like `sage -i normaliz pynormaliz`: I wouldn't
On Tuesday, 7 February 2023 at 09:56:06 UTC-8 dim...@gmail.com wrote:
I don't think setting MAKE is a good idea.
Did you try simply
make -j8 build
Thanks! I've tried "touch src/sage/structure/*" -- that triggers quite a
large part of sagemathlib to be rebuilt. It used only 4 processes
For the trac-to-github transition I decided to move over my git upstream
and origin. That all seems to have worked fine and I pulled the latest
develop and ran "make configure" (was already happy) and then "make". This
worked fine for the most part and with export MAKE="make -j8" it went quite
On Sunday, 9 October 2022 at 08:45:36 UTC-7 Emmanuel Charpentier wrote:
> ... and all is not fresh in Sympy's realm either.
>
> Full details in [this ask.sagematjh.org question](
>
On Sunday, 4 September 2022 at 10:31:42 UTC-7 george...@gmail.com wrote:
> All,
> I am about to submit a math paper to a journal. I would like to include a
> proper citation for Sage. The Sage web page says:
>
> "Also, be sure to find out which components of SageMath, e.g. NumPy, PARI,
> GAP,
On Wednesday, 1 June 2022 at 05:41:33 UTC+2 hongy...@gmail.com wrote:
> On Wednesday, June 1, 2022 at 1:55:45 AM UTC+8 Nils Bruin wrote:
>
>> The "GO" mentioned here should correspond to the O(3;1) (or perhaps
>> O(1;3) ) mentioned in the wikipedia article.
>>
&
help an expert
in giving you further tips.
On Tuesday, 31 May 2022 at 08:43:54 UTC+2 hongy...@gmail.com wrote:
> On Sunday, May 29, 2022 at 6:27:18 PM UTC+8 Nils Bruin wrote:
>
>> It depends a little on what coefficients you want. If you're happy with
>> rational numb
It depends a little on what coefficients you want. If you're happy with
rational numbers then this should do the trick:
G = diagonal_matrix(QQ,4,[-1,1,1,1])
lorentz_group = GO(4,QQ,invariant_form=G)
which just constructs the group of (in this case QQ-valued) matrices that
preserve the
On Thursday, 5 May 2022 at 02:03:30 UTC-7 Ha wrote:
> For Example: I tried this:
>
> f(X[1] = 1, X[2] = 5)
>
> and got this error:
>
> File "", line 10 f(X[Integer(1)] =
> Integer(1), X[Integer(2)] = Integer(5))
> ^ SyntaxError: keyword can't be an expression
>
> Indeed, that does not work.
Can you explain a little more about what does not work? When I try to
replicate your example, everything works as expected:
sage: n=2
: F = GF(7)
: Rx=PolynomialRing(F,n,'x')
: X=Rx.gens()
sage: f=X[0]+X[1]
sage: f(x0=1)
x1 + 1
sage: f(x0=1,x1=1)
2
Alternatively you can evaluate
On Saturday, 16 April 2022 at 05:37:16 UTC-7 list...@gmail.com wrote:
>
> Thanks Samuel and Emmanuel.
>
> Follow up question: Why does
> var('lambda',n=1)
> fail?
>
Because the code in question tests the string actually passed in for
whether it's a valid python identifier.
Probably this is
On Sunday, 6 March 2022 at 09:13:42 UTC-8 list...@gmail.com wrote:
>
> Beginner's questions, I guess.
>
> Some time ago, Emmanuel Charpentier wrote
>
> var("v", n=2)
>
> which gives
>
> (v0, v1)
>
> Where is this documented? I have been unable to find keywords for var
> other than domain and
On Friday, 11 February 2022 at 07:51:17 UTC-8 mille...@gmail.com wrote:
> I'm trying to do some least squares linear algebra. I built a matrix from
> lists that I converted into column vectors and used the 'augment' function.
Small detail, but slightly more efficient (it may not matter for
On Monday, 31 January 2022 at 15:19:49 UTC-8 Emmanuel Charpentier wrote:
> As advertised, an atempt at a minimal (non-)working example :
>
> # Reproducible minimal example
> with seed(0): M = matrix(AA, 3, 3, lambda u,v: AA.random_element())
> # Working ring
> WR =
On Saturday, 29 January 2022 at 13:51:14 UTC-8 Emmanuel Charpentier wrote:
> /usr/local/sage-9/local/var/lib/sage/venv-python3.9/lib/python3.9/site-packages/sage/rings/qqbar.py
>
> in pari_field(self)
>
>>3134 if self._pari_field is None:
>>3135 pari_pol =
In a blizzard?
P=sage.plot.graphics.Graphics()
P.show(axes=False)
In general, though, this is not a very mathematical question, nor one for
which a computer algebra package is going to be the best tool. Perhaps if
you give some more context, someone will be able to give you more useful
help.
That's a python question. See for instance,
https://stackoverflow.com/questions/2582138/finding-and-replacing-elements-in-a-list
If you scroll down, there are some suggestions there that deal with
multiple replacements as well
On Tuesday, 28 December 2021 at 06:09:35 UTC-8 cyrille piatecki
The "regulator" access routine should indeed at least allow to produce the
regulator with the precision that pari used.
If you look at the source of "regulator" you can see how to get the
regulator to better precision. If K is your number field, then:
K.pari_bnf().bnf_get_reg().sage()
gets
I think Ubuntu 18.04 might only have an old, python2-based, version of
sagemath packaged:
https://packages.ubuntu.com/bionic/sagemath
https://www.sagemath.org/download.html does host binary builds for 18.04,
so downloading from there could get you version 9.4, which does run on
python3. Or
On Wednesday, 8 September 2021 at 09:24:15 UTC-7 max...@gmail.com wrote:
> Hi Simon,
>
> Thank you for your insight, and let me state that I
> find InfinitePolynomialRing useful in combinatorics to deal with
> (truncated) multivariate generating functions with apriori unknown number
> of
On Wednesday, 8 September 2021 at 07:30:21 UTC-7 Simon King wrote:
>
> As I said, differentiation is not supposed to work. But I (as original
> author) don't fully understand *why* it sometimes works and how to fix
> that (by "fix", I mean "make it not work and, in the best case, suggest
> to
I'd suspect the problem is not the ray tracing but the description of the
object. Probably, `parametric_plot` produces a description of your shape
with tubular segments and with a min_depth=20 it probably produces *very*
many of them. So you probably don't get to ray tracing: you're stuck in
On Thursday, 8 July 2021 at 09:49:18 UTC-7 Emmanuel Charpentier wrote:
> Dear Nils, dear list,
>
> Le jeudi 8 juillet 2021 à 01:01:44 UTC+2, Nils Bruin a écrit :
>
>> I think the main problem in f(x) is a preparser problem:
>> https://trac.sagemath.org/ticket/11621
&
I think the main problem in f(x) is a preparser problem:
https://trac.sagemath.org/ticket/11621
The other problems could just be numerical instability. The normal
precision is 53 bits, which is good for about 16 decimal digits. The
constants in the formula are more than that, so if there is
Thank you all! I needed a few steps here that were mentioned on
aka.ms/wsl2-install :
dism.exe /online /enable-feature
/featurename:Microsoft-Windows-Subsystem-Linux /all /norestart
dism.exe /online /enable-feature /featurename:VirtualMachinePlatform /all
/norestart
(restart)
wsl
on and as a tablet OS, win10 seems to be performing just
fine). I think the students who'd be using Win10 for development would have
beefier machines.
On Tuesday, 1 June 2021 at 01:36:31 UTC-7 dim...@gmail.com wrote:
> On Tue, Jun 1, 2021 at 2:25 AM Nils Bruin wrote:
> >
> > Update:
Update:
wsl --help isn't particularly eager to divulge version information, but
some of it inadvertently has slipped through: in the description of the
"--shutdown" option there is a mention of "the WSL 2 lightweight utility
virtual machine",
so unless wsl has a mysterious option that has a
On Monday, 31 May 2021 at 17:57:34 UTC-7 wst wrote:
> I also think there are some subtleties with WSL versus WSL2 - which were
> you actually using? They are dramatically different technologies…
How do I tell which one I'm running as a user? I wasn't particularly
planning on learning how to
Asking for a friend ... or rather linux-challenged students:
What's the most convenient and workable way of running sage on Win10 if you
want to do a moderate amount of sage development as well (so, things like
`sage -b` or `make build` should probably work, as should `git track push`
etc.) ?
On Monday, January 25, 2021 at 7:09:32 AM UTC-8 Nikos Apostolakis wrote:
> Dear Nils,
>
> [...] I think treating rational integers as integers is safe. Actually
> Sage does that
>
> sage: 8/2 in ZZ
> True
>
>
> So to have a function with integer input throw an error when you feed it a
>
On Monday, January 25, 2021 at 7:16:00 AM UTC-8 ... wrote:
> Is this the same as derivative(f(xp(x, y, z, t), yp(x, y, z, t), zp(x, y,
> z, t), tp(x, y, z, t)) , x, 2)?
>
> No, it is not. Look up "Multivariable Chain rule".
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On Thursday, January 21, 2021 at 7:21:52 AM UTC-8 Nikos Apostolakis wrote:
> Dear Vincent,
>
> Thank you very much, that fixes it.
>
> IMHO this is a bug though, or at least an inconsistent behavior. Most of
> the time Sage silently coerces things to the appropriate type so commands
> just
I suspect you want to collect wrt. the second partial derivatives of
f(x,y,z,t) with respect to x,y,z,t ; evaluated at xp,yp,zp,tp. Those are
not the same as the partial second derivatives of f(xp,yp,zp,tp) with
respect to (x,y,z,t). If you inspect what derivative(f(xp, yp, zp, tp), x,
2)
On Sunday, November 29, 2020 at 1:23:36 PM UTC-8 list...@gmail.com wrote:
>
> I agree with you, but at the same time I wonder what would be wrong with
> replacing
> '!' → '.factorial()'
>
> Good observation: python already has postfix operators! I still don't like
factorial notation; not even
With the current regexp-based rewriting we'd need a pattern of the kind
'!' -> 'factorial( '**" but that's very
basic and doesn't need any context. To change an implicit unary postfix
operator to an explicitly parenthesized prefix operator need almost
complete parsing. Had the factorial been
On Thursday, September 10, 2020 at 6:50:11 AM UTC-7, cyrille piatecki wrote:
>
>
> I would like to know is there is a way to centerr results in SageCells.
>
I'd expect that with a cunning use of CSS style sheets, you can pretty much
change any aspect of the formatting. It would require that you
On Friday, August 28, 2020 at 10:36:20 AM UTC-7, Dima Pasechnik wrote:
>
> technically, money goes to a registered charity Open Collective, which
> takes a 10% cut for admin etc costs (and Stripe takes a cut, too) and gives
> the rest to us. At least the setup is very easy - noone had time so
Thank you for setting this up! It looks like a very generous move from
GIthub to run the donation collection infrastructure and still give 100% to
the sponsored party. I think people might be more inclined to donate if it
were clearer where the money went. Is it the intention that this money
On Wednesday, August 19, 2020 at 5:24:48 AM UTC-7, Paul Leopardi wrote:
>
> See also
> https://groups.google.com/g/sage-support/c/3WKui-LojKs/m/DgEPBGF3AQAJ and
> https://trac.sagemath.org/ticket/28444
>
> On Wednesday, 19 August 2020 at 22:17:40 UTC+10 Paul Leopardi wrote:
>
>> Hello,
>> I am
On Sunday, August 16, 2020 at 4:22:22 AM UTC-7, Dima Pasechnik wrote:
>
>
> I guess this has to do with Python hashing; objects are not checked
> for `==` equality when you do {},
> but for equality w.r.t. to certain internal representation:
> sage: g = libgap.SymmetricGroup(3)
> sage: x =
On Wednesday, August 5, 2020 at 10:19:57 AM UTC-7, john_perry_usm wrote:
>
>
> It's possible that you want a local term ordering. Unlike global term
> orderings, in a local ordering 1>t for any monomial t.
>
> TO = TermOrder("negdegrevlex",3)
> R = PolynomialRing(GF(2),'x',3,order=TO)
>
On Wednesday, August 5, 2020 at 4:28:42 AM UTC-7, Santanu wrote:
>
> Dear all,
> Consider ideal I= over the binary field GF(2).
> Then (x2).reduce(I) gives x2. I want it to be x0*x1.
> In fact , I want this kind of reduction always should give quadratic
> polynomial
> (I know that this is
On Monday, August 3, 2020 at 9:26:38 PM UTC-7, Tim McLarnan wrote:
>
> I tried copying the kernel folders from CoCalc and editing them in what I
> thought was the right way and putting them with the kernel folders on my
> machine. This produced kernels that show up in Jupyter, but that don't
>
On Thursday, June 18, 2020 at 12:18:40 AM UTC-7, Dima Pasechnik wrote:
>
>
> Python's print() function allows you to do formatting, whereas show() is
> just a quick hack.
>
> little correction here: python's strings allow you to do formatting,
meaning that whatever formatting you want to do, you
On Friday, May 1, 2020 at 12:30:10 PM UTC-7, John Atom wrote:
>
> If I define a function:
>
> f(x) = x**2
>
> and then print it, sage always prints it as `x^2`.
>
> Is it possible to change the default output of the power operator to '**'
> ?
>
I suspect it will be hard, because these "^" are
On Friday, April 10, 2020 at 1:05:15 PM UTC-7, Ne reknu wrote:
>
> Thank you for your answer. Unfortunatelly the numpy.vectorize(Rce)
> generates the very same error (I tried to plot it). Or pehaps I
> misunderstood your intention?
>
No, my guess would have been that would work, but then
On Friday, April 10, 2020 at 1:02:12 AM UTC-7, Ne reknu wrote:
>
> Hello.
> I need a root finder of a real function which work with a initial guess.
> That can be done by scipy fsolve, but if I try to aply it on a gamma (or
> Bessel) function in Sage, I recieve following error message:
>
>
On Tuesday, March 10, 2020 at 6:22:45 AM UTC-7, Dima Pasechnik wrote:
>
> Suppose I have
>
> R.=QQ[]
> K.=QQ[]
> f=R.hom([u*v,u^2,v^2-u^2])
>
> then for any even degree p in K one can compute
> a preimage under f (e.g. u^4-u*v goes to y^2+x, etc)
>
I think the general way (which should be
http://doc.sagemath.org/html/en/reference/calculus/sage/calculus/var.html#sage.calculus.var.function
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On Tuesday, January 21, 2020 at 5:23:43 PM UTC-8, Eric Zhu wrote:
>
> Is there a way to get the endomorphism ring of an elliptic curve in Sage?
>
with
d=E.cm_discriminant()
you know that End(E) is the cm order of discriminant d. If E does not have
cm, then End(E)=Z
--
You received this
On Sunday, January 19, 2020 at 6:46:50 AM UTC-8, mendes wrote:
>
> #But, for t>1, there is a RuntimeError: mismatch in sr-to-maxima
> var('x,t')
> assume(1 f=unit_step(t-1)
> g=t
> fg = integrate(f(t=x)*g(t=t-x),x,0,t).simplify_full().expand()
> show(fg)
> forget()
>
> In the meantime, you can, as
You should file a ticket. Symbols are getting mixed up. Recently there were
some changes to the order in which different integration algorithms are
used, and I suspect that this happens as a side effect.
I can tell you what I see happen:
This is what the actual "unit_step" function should be.
On Saturday, January 18, 2020 at 7:19:03 AM UTC-8, mendes wrote:
>
>
> RuntimeError: Encountered operator mismatch in sr-to-maxima translation
>
>
The error indicates that the sage-to-maxima dictionary used in sr_to_max is
in an inconsistent state. Its state is a mix of preinitialization and
On Tuesday, January 14, 2020 at 5:36:27 AM UTC-8, Александр Ватузов wrote:
>
> Now I constantly know, that problem was in using
>
> divmod(n, base**half)
>
> instead of
>
> n // (base**half), n % (base**half)
>
The second option yields a performance regression relative to the first,
because you
The problem is fairly subtle, but it boils down to the fact that input_box
wants a *string* as default value , because a string is also what it gets
from the user. Note that your names x and y are bound to x(t) and y(t)
respectively. Input box turns its default parameter to a string, so the
On Thursday, November 7, 2019 at 7:50:00 AM UTC-8, Subrata Nandi wrote:
>
>
>
> On Thursday, November 7, 2019 at 9:13:17 PM UTC+5:30, Subrata Nandi wrote:
>>
>> Thanks Emmanuel Charpentier for your reply. But the entry of my matrix
>> is only symbolic variables. For example I am giving one short
On Monday, November 4, 2019 at 2:53:18 PM UTC-8, Dima Pasechnik wrote:
>
> Is Sage Jupyter kernel pipe-based?
> (Jupyter uses zeromq, which can do inproc communication, and as far as I
> know some kernels do this)
>
> Oh sorry. Perhaps. I didn't investigate. I'd expect that the jupyter
ipython
On Monday, November 4, 2019 at 10:27:02 AM UTC-8, Dima Pasechnik wrote:
>
> Incidentally this brings up the question on how one should deal with
> outdated (as they had to by Python2-compatible)
> Sage's iPython and Jupyter.
>
> What has worked for me for a long time is to install the sage
On Friday, October 25, 2019 at 3:27:42 AM UTC-7, Emmanuel Charpentier wrote:
>
> Thanks a lot ! That's perfectly clear...
>
> Any hints on how to file a ticket for this issue ?
>
> The minimal example excellently shows the problem, so including that would
be great. It's easy to find the
Yes, that's a bug. It happens in F(x).operator()._tderivative_ It
differentiates the bounds in case those vary with the differentiation
variable, and that does not work for "0". If you define
var('y')
F(x)=integrate(f(t),y,x)
you get the right result (with y not being a function of t).
The
On Tuesday, October 22, 2019 at 1:36:24 PM UTC-7, david.guichard wrote:
>
> Thanks for the suggestion, but it doesn't appear to work for me. My code is
>
> csv.reader(open('http://myserver/xxx.csv'))
>
>
I don't think python's standard "open" supports opening URLs. You need
something like
On Tuesday, October 22, 2019 at 8:52:44 AM UTC-7, david.guichard wrote:
>
> I have a cocalc sage worksheet that reads data from a csv file. Is there
> any way to do this in the single cell server, that is, read data from an
> external file? I'm guessing not, but it would be handy.
>
Accessing a
On Friday, October 11, 2019 at 5:23:15 AM UTC-7, cyrille piatecki wrote:
>
> Hello,
>
> dispite all my effort under windows 10, I am not able to load any
> notebook inside a current notebook with the command load(). I hav tried
> "c://..." c:/..." "c:\\...". From this I cannot explain to sage
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