[sage-support] Re: loading maxima
and so? What to do so that it works? Mathieu -- 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: http://www.sagemath.org To unsubscribe, reply using remove me as the subject.
Re: [sage-support] strange n()
Mike Hansen schrieb: On Sat, Apr 10, 2010 at 3:37 AM, bb bblo...@arcor.de wrote: sage: n(sqrt(2.), digits=40) 1.414213562373095145474621858738828450441 sage: n(sqrt(2), digits=40) 1.414213562373095048801688724209698078570 sage: If you wanted this to be more like Maxima, the appropriate thing to do would some something like: sage: RealNumber = RealField(137) sage: sqrt(2.0) 1.414213562373095048801688724209698078570 sage: sqrt(2).n(digits=40) 1.414213562373095048801688724209698078570 Sage is missing the errror forwarding of Mathematica. Yes, Sage does not have a numerical type that does Mathematica's significance arithmetic. An interesting thread about the merits and demerits of significance arithmetic is http://sci.tech-archive.net/Archive/sci.math.symbolic/2008-03/msg00014.html . One could do a little work to get Sage's interval arithmetic to do something similar. --Mike Tnx for helping. I did some more experimentation. I dont want to bother you, but if you have some time and some pation I would be thankfull for one more explanation. Your tip works as expected, but if I use the method n() I still get 53 bit of significant bits??? (see last expression of the snippet.) I argue, that the parameter of n() is set elsewhere in another Variable than RealNumber? sage: RealNumber = RealField(137) sage: sqrt(2.) 1.414213562373095048801688724209698078570 sage: _.prec() 137 sage: sqrt(2.000) 1.414213562373095048801688724209698078570 sage: _.prec() 137 sage: n(sqrt(2.000), digits=60) 1.41421356237309504880168872420969807856967336610324780267484 sage: _.prec() 203 sage: n(sqrt(2.000)) 1.41421356237310 sage: _.prec() 53 sage: Regards BB -- 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: http://www.sagemath.org To unsubscribe, reply using remove me as the subject.
[sage-support] Question about numerical linear algebra.
I want to use RDF linear algebra.
As far as i understand, operations are implemented using numpy/scipy.
But many things differ from a direct call to scipy modules; for example:
(computing the Singular Value Decomposition of a matrix):
sage: A=matrix(RDF,[[1,3,2],[1,2,3],[0,5,2],[1, 1, 1]])
sage: U,Sig,V=A.SVD()
but, a direct call to scipy (even in sage) is:
from scipy import *
from scipy.linalg import *
A=mat('[1 3 2; 1 2 3; 0 5 2; 1, 1, 1]')
M,N=A.shape
U,s,Vh=svd(A)
-Qusetion: is there some dictionary, some documentation about how
the scipy functions are mapped to sage? and what can be directly used?
One can use A.LU(), A.QR()... witeh A a matrix(RDF,...), all this
without importing explicitly anything.
-Remark:
In the preceding examples, if you compare as given by U,Sig,V=A.SVD()
and U given by U,s,Vh=svd(A) they are transposed :-(
Yours, sincerely
t.
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attachment: tdumont.vcf
[sage-support] Re: points on elliptic curves mod N
Here's the problem. For an elliptic curve defined over a ring, not a field, the _point_class (which is the class used to hold its points) is the class EllipticCurvePoint, but that class has almost no methods at all defined for it, not even an __init__ method. By contrast, for elliptic curves defined over fields the point class is EllipticCurvePoint_field (or EllipticCurvePoint_finite_field, etc), which all have a huge amount of functionality. One could defined a new class called something like EllipticCurvePoint_commutative_ring, and move most of the functionality from the field class to the ring class, but that would be a lot of work, and there would be a danger that the operations over fields would be slowed down. And one would have to decide how to deal with the group law now only being partial (which I know can be done, but I forget the details). It would be a good student project to at least handle the case where the base ring was of the form Integers(n), where the error message produced by trying to invert a non-invertible constant would helpfully tell you the factorization of the modulus. John On Apr 11, 5:17 am, Alec Mihailovs alec.mihail...@gmail.com wrote: On Apr 10, 8:27 pm, Robert Bradshaw rober...@math.washington.edu wrote: This particular point however seems to have order 3 on both E(GF(67)) and E(GF(89)). E=EllipticCurve([1,R(1)]) seems to be working, 7*E([0,1]) Traceback (click to the left of this block for traceback) ... ZeroDivisionError: Inverse of 5092 does not exist Alec -- 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: http://www.sagemath.org To unsubscribe, reply using remove me as the subject.
Re: [sage-support] strange n()
On Sun, Apr 11, 2010 at 10:01 AM, bb bblo...@arcor.de wrote: Tnx for helping. I did some more experimentation. I dont want to bother you, but if you have some time and some pation I would be thankfull for one more explanation. Your tip works as expected, but if I use the method n() I still get 53 bit of significant bits??? (see last expression of the snippet.) I argue, that the parameter of n() is set elsewhere in another Variable than RealNumber? Yes, in the code for n, we have the following: if prec is None: if digits is None: prec = 53 else: prec = int((digits+1) * 3.32192) + 1 so it just defaults to 53 if nothing is passed in. The RealNumber = RealField(137) just changes the precision for floating point literals entered on the command line. --Mike -- 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: http://www.sagemath.org To unsubscribe, reply using remove me as the subject.
Re: [sage-support] Re: loading maxima
On Sun, Apr 11, 2010 at 8:18 AM, Mathieu Roux mthr...@gmail.com wrote: and so? What to do so that it works? Did Maxima get installed? Does the following file exist: /Applications/sage-4.3.5/local/bin/maxima ? If not, then it doesn't seem like Maxima installed correctly. You could try running sage -f /Applications/sage-4.3.5/spkg/standard/maxima* and report back what happens. --Mike -- 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: http://www.sagemath.org
Re: [sage-support] strange n()
Mike Hansen schrieb: On Sun, Apr 11, 2010 at 10:01 AM, bb bblo...@arcor.de wrote: Tnx for helping. I did some more experimentation. I dont want to bother you, but if you have some time and some pation I would be thankfull for one more explanation. Your tip works as expected, but if I use the method n() I still get 53 bit of significant bits??? (see last expression of the snippet.) I argue, that the parameter of n() is set elsewhere in another Variable than RealNumber? Yes, in the code for n, we have the following: if prec is None: if digits is None: prec = 53 else: prec = int((digits+1) * 3.32192) + 1 so it just defaults to 53 if nothing is passed in. The RealNumber = RealField(137) just changes the precision for floating point literals entered on the command line. --Mike Tnx for clearing that n()-question! In an earlier posting (I am always thankful for any help!) you wrote: One could do a little work to get Sage's interval arithmetic to do something similar. Would be an interesting experiment. I found an internet page about that topic concerning MPFR from 2/5/2006: http://www.ma.utexas.edu/users/kschalm/mpfr-in-sage.html (MPFR seems to be very broadly used by different Progs under GNU Lesser GPL. Added is a list of related software.) There are used some Sage-examples with a strange line-numbering with underscores? May be that is an outdated Sage-Version? Actual versions do not do any line numbering. I did not find any evidence that MPFR or MAPM is included in Sage? I do not understand if MPFR is compiled with Sage in this examples on that page? I cannot find any evidence that MPFR is loaded? In an extension of the floating point issue I am actually interested in: I found a list of libs to support floating point arithmetics that are not in the list of included libs to Sage. I found some examples to include tools with a CLI via http in the documentatin. I did not find hints how to include C/C++ or other language libs to Sage? (To clear that statement: The fact I could not find it does not mean it is not documented in some place!) Again - please ignore my boring question if you feel bothered - I can understand that! With yor response you opened a door for floting point questions. Tnx anyway - regards BB -- 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: http://www.sagemath.org To unsubscribe, reply using remove me as the subject.
Re: [sage-support] strange n()
On Sun, Apr 11, 2010 at 12:47 PM, bb bblo...@arcor.de wrote: In an earlier posting (I am always thankful for any help!) you wrote: One could do a little work to get Sage's interval arithmetic to do something similar. Would be an interesting experiment. Here's a brief example sage: RIF Real Interval Field with 53 bits of precision sage: R = RealIntervalField(200); R Real Interval Field with 200 bits of precision sage: f = RIF(pi) + 0.5; f 3.641592653589794? sage: g = R(f); g 3.641592653589794? sage: g.parent() Real Interval Field with 200 bits of precision Even when you increase the precision, it doesn't print out more digits since it knows the upper and lower bounds. However, this does not currently play nice with the .n() stuff. I found an internet page about that topic concerning MPFR from 2/5/2006: http://www.ma.utexas.edu/users/kschalm/mpfr-in-sage.html (MPFR seems to be very broadly used by different Progs under GNU Lesser GPL. Added is a list of related software.) There are used some Sage-examples with a strange line-numbering with underscores? May be that is an outdated Sage-Version? Actual versions do not do any line numbering. This page is indeed quite outdated. I did not find any evidence that MPFR or MAPM is included in Sage? I do not understand if MPFR is compiled with Sage in this examples on that page? I cannot find any evidence that MPFR is loaded? MPFR is included in Sage by default. Sage's RealNumber class is a wrapper around an MPFR object. Any high-precision floating point arithmetic in Sage uses MPFR. In an extension of the floating point issue I am actually interested in: I found a list of libs to support floating point arithmetics that are not in the list of included libs to Sage. I found some examples to include tools with a CLI via http in the documentatin. I did not find hints how to include C/C++ or other language libs to Sage? (To clear that statement: The fact I could not find it does not mean it is not documented in some place!) If you want to interface with other C/C++ libraries, the easiest way to do so is using Cython [1]. There are also lots of examples in the Sage library; for example, $SAGE_ROOT/devel/sage/sage/rings/real_mpfr.pyx --Mike -- 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: http://www.sagemath.org To unsubscribe, reply using remove me as the subject.
[sage-support] Re: Inverses of Large Sparse Matrices
When I try to make a dense matrix, I get a MemoryError: out of memory allocating a matrix. I was able to output my matrix into a .txt file and tweak it to be read into Matlab. Matlab was able to compute it pretty quickly, so I feel like it is doable in Sage as well. Maybe I have a problem with my code? I'm unsure how to fix this problem. On Apr 9, 12:00 pm, William Stein wst...@gmail.com wrote: On Friday, April 9, 2010, Leo Maloney leo.b.malo...@gmail.com wrote: My Matrix consists of zeros ones, and -1/9s, so I was intially computing it over Q. I'm trying to re-run the program over R in hopes that it will use approximations rather than try to explicitly state the fractions. I am using a Macintosh OSX with 4 gigs of ram, it seems that this should be sufficient. Definitely try doing it with a dense matrix over QQ too; it might be possible, though the answer will be big. If you provide me the matrix I could try on my 128gb computer... I also know the matrix inversion code over QQ well, since I wrote some of it. On Apr 9, 11:03 am, Robert Bradshaw rober...@math.washington.edu wrote: On Apr 9, 2010, at 10:53 AM, Leo Maloney wrote: I'm trying to compute the inverse of a 5000 x 5000 sparse matrix. What is the basering? I'm getting an EOF error after it runs for about 5 hours, and then it states that sage is trying to access unallocated memory. Is there a way I can increase the memory for this computation? Every time I Google it, all I can find is the benefits sage(plant) has on memory. What operating system are you on. Are you using Sage in a VM (on Windows)? If so, you can increase the amount of memory allocated to the virtual machine. Otherwise, have you checked to see if you even have any memory left on your computer when doing the computation? (Perhaps the only way to increase the memory is to buy more RAM or run it on a different computer.) - Robert -- 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 athttp://groups.google.com/group/sage-support URL:http://www.sagemath.org To unsubscribe, reply using remove me as the subject. -- William Stein Associate Professor of Mathematics University of Washingtonhttp://wstein.org -- 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: http://www.sagemath.org
[sage-support] Inverses of Large Sparse Matrices
On Sunday, April 11, 2010, Leo Maloney leo.b.malo...@gmail.com wrote: When I try to make a dense matrix, I get a MemoryError: out of memory allocating a matrix. I was able to output my matrix into a .txt file and tweak it to be read into Matlab. Matlab was able to compute it pretty quickly, so I feel like it is doable in Sage as well. Maybe I have a problem with my code? I'm unsure how to fix this problem. Do you want a floating point answer or an exact rational answer? Matlab will not give you a correct exact rational answer (it will appeat to in a certain mode but will in fact return nonsense). On Apr 9, 12:00 pm, William Stein wst...@gmail.com wrote: On Friday, April 9, 2010, Leo Maloney leo.b.malo...@gmail.com wrote: My Matrix consists of zeros ones, and -1/9s, so I was intially computing it over Q. I'm trying to re-run the program over R in hopes that it will use approximations rather than try to explicitly state the fractions. I am using a Macintosh OSX with 4 gigs of ram, it seems that this should be sufficient. Definitely try doing it with a dense matrix over QQ too; it might be possible, though the answer will be big. If you provide me the matrix I could try on my 128gb computer... I also know the matrix inversion code over QQ well, since I wrote some of it. On Apr 9, 11:03 am, Robert Bradshaw rober...@math.washington.edu wrote: On Apr 9, 2010, at 10:53 AM, Leo Maloney wrote: I'm trying to compute the inverse of a 5000 x 5000 sparse matrix. What is the basering? I'm getting an EOF error after it runs for about 5 hours, and then it states that sage is trying to access unallocated memory. Is there a way I can increase the memory for this computation? Every time I Google it, all I can find is the benefits sage(plant) has on memory. What operating system are you on. Are you using Sage in a VM (on Windows)? If so, you can increase the amount of memory allocated to the virtual machine. Otherwise, have you checked to see if you even have any memory left on your computer when doing the computation? (Perhaps the only way to increase the memory is to buy more RAM or run it on a different computer.) - Robert -- 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 athttp://groups.google.com/group/sage-support URL:http://www.sagemath.org To unsubscribe, reply using remove me as the subject. -- William Stein Associate Professor of Mathematics University of Washingtonhttp://wstein.org -- 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: http://www.sagemath.org -- William Stein Associate Professor of Mathematics University of Washington http://wstein.org -- 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: http://www.sagemath.org
[sage-support] Re: Question about numerical linear algebra.
On Apr 11, 1:22 pm, Thierry Dumont tdum...@math.univ-lyon1.fr wrote: In the preceding examples, if you compare as given by U,Sig,V=A.SVD() and U given by U,s,Vh=svd(A) they are transposed :-( U is the same, Sig is a diagonal matrix with diagonal entries being elements of vector s, and V is Hermitian transposed to Vh, as it supposed to be according to the help pages - it should be U*Sig*V.conjugate().transpose() == A Alec -- 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: http://www.sagemath.org To unsubscribe, reply using remove me as the subject.
[sage-support] (1 - i) == -(i + 1) ??
[m...@vector ~]$ sage -- | Sage Version 4.3.1, Release Date: 2010-01-20 | | Type notebook() for the GUI, and license() for information.| -- sage: (1-I)/(sqrt(2)-1) -(I + 1)/(sqrt(2) - 1) 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 http://groups.google.com/group/sage-support URL: http://www.sagemath.org To unsubscribe, reply using remove me as the subject.
[sage-support] Re: (1 - i) == -(i + 1) ??
On Apr 11, 4:51 pm, Mike Witt msg...@gmail.com wrote: [m...@vector ~]$ sage -- | Sage Version 4.3.1, Release Date: 2010-01-20 | | Type notebook() for the GUI, and license() for information. | -- sage: (1-I)/(sqrt(2)-1) -(I + 1)/(sqrt(2) - 1) In Sage 4.3.4 (in Windows) that I am using, (1-I)/(sqrt(2)-1) (-I + 1)/(sqrt(2) - 1) Alec -- 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: http://www.sagemath.org To unsubscribe, reply using remove me as the subject.
Re: [sage-support] (1 - i) == -(i + 1) ??
On 04/11/2010 01:56:45 PM, Minh Nguyen wrote: Hi Mike, On Mon, Apr 12, 2010 at 6:51 AM, Mike Witt msg...@gmail.com wrote: [m...@vector ~]$ sage -- | Sage Version 4.3.1, Release Date: 2010-01-20 | | Type notebook() for the GUI, and license() for information. | -- sage: (1-I)/(sqrt(2)-1) -(I + 1)/(sqrt(2) - 1) This has been fixed in Sage 4.3.5: Ahh, thanks! Do you happen to know if 4.3.5 builds on Fedora 12? (I remember seeing that one of the recent ones had problems) -Mike -- 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: http://www.sagemath.org To unsubscribe, reply using remove me as the subject.
Re: [sage-support] (1 - i) == -(i + 1) ??
Mike Witt wrote: On 04/11/2010 01:56:45 PM, Minh Nguyen wrote: Hi Mike, On Mon, Apr 12, 2010 at 6:51 AM, Mike Witt msg...@gmail.com wrote: [m...@vector ~]$ sage -- | Sage Version 4.3.1, Release Date: 2010-01-20 | | Type notebook() for the GUI, and license() for information.| -- sage: (1-I)/(sqrt(2)-1) -(I + 1)/(sqrt(2) - 1) This has been fixed in Sage 4.3.5: Ahh, thanks! Do you happen to know if 4.3.5 builds on Fedora 12? (I remember seeing that one of the recent ones had problems) It builds ok, but there are a few issues with some tests. Jaap -Mike -- 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: http://www.sagemath.org To unsubscribe, reply using remove me as the subject.
Re: [sage-support] (1 - i) == -(i + 1) ??
On 04/11/2010 02:39:58 PM, Jaap Spies wrote: Mike Witt wrote: On 04/11/2010 01:56:45 PM, Minh Nguyen wrote: Hi Mike, On Mon, Apr 12, 2010 at 6:51 AM, Mike Witt msg...@gmail.com wrote: [m...@vector ~]$ sage -- | Sage Version 4.3.1, Release Date: 2010-01-20 | | Type notebook() for the GUI, and license() for information.| -- sage: (1-I)/(sqrt(2)-1) -(I + 1)/(sqrt(2) - 1) This has been fixed in Sage 4.3.5: Ahh, thanks! Do you happen to know if 4.3.5 builds on Fedora 12? (I remember seeing that one of the recent ones had problems) It builds ok, but there are a few issues with some tests. Jaap I notice it says this on the download page: Mirror network is currently synchronizing. Please try again later. A new release is upcoming. Maybe come back later for the next version of Sage? I don't remember ever seeing either of those messages before. I guess I should wait? -Mike -- 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: http://www.sagemath.org To unsubscribe, reply using remove me as the subject.
[sage-support] Re: loading maxima
Hello, in fact, the file /Applications/sage-4.3.5/local/bin/maxima does not exist! it is very surprising because it is said that sage would install all that it needs... when i run: sage -f /Applications/sage-4.3.5/spkg/standard/maxima* there is a long answer which finishes with *** Failed to make Maxima. *** real0m7.326s user0m1.202s sys 0m2.460s sage: An error occurred while installing maxima-5.20.1 Please email sage-devel http://groups.google.com/group/sage-devel explaining the problem and send the relevant part of of /Applications/sage-4.3.5/install.log. Describe your computer, operating system, etc. If you want to try to fix the problem yourself, *don't* just cd to /Applications/sage-4.3.5/spkg/build/maxima-5.20.1 and type 'make check' or whatever is appropriate. Instead, the following commands setup all environment variables correctly and load a subshell for you to debug the error: (cd '/Applications/sage-4.3.5/spkg/build/maxima-5.20.1' '/ Applications/sage-4.3.5/sage' -sh) When you are done debugging, you can type exit to leave the subshell. Any idea? Mathieu -- 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: http://www.sagemath.org To unsubscribe, reply using remove me as the subject.
Re: [sage-support] (1 - i) == -(i + 1) ??
Mike Witt wrote: On 04/11/2010 02:39:58 PM, Jaap Spies wrote: Mike Witt wrote: On 04/11/2010 01:56:45 PM, Minh Nguyen wrote: Hi Mike, On Mon, Apr 12, 2010 at 6:51 AM, Mike Witt msg...@gmail.com wrote: [m...@vector ~]$ sage -- | Sage Version 4.3.1, Release Date: 2010-01-20 | | Type notebook() for the GUI, and license() for information. | -- sage: (1-I)/(sqrt(2)-1) -(I + 1)/(sqrt(2) - 1) This has been fixed in Sage 4.3.5: Ahh, thanks! Do you happen to know if 4.3.5 builds on Fedora 12? (I remember seeing that one of the recent ones had problems) It builds ok, but there are a few issues with some tests. Jaap I notice it says this on the download page: Mirror network is currently synchronizing. Please try again later. A new release is upcoming. Maybe come back later for the next version of Sage? I don't remember ever seeing either of those messages before. I guess I should wait? I see no problems downloading from North America: http://www.sagemath.org/download-source.html The European mirrors seem to be in trouble? Jaap -Mike -- 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: http://www.sagemath.org To unsubscribe, reply using remove me as the subject.
Re: [sage-support] Re: loading maxima
On Sun, Apr 11, 2010 at 2:55 PM, Mathieu Roux mthr...@gmail.com wrote: Any idea? I need to know what error(s) came before Failed to make Maxima in order to figure out what's going on. --Mike -- 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: http://www.sagemath.org To unsubscribe, reply using remove me as the subject.
Re: [sage-support] (1 - i) == -(i + 1) ??
Mike Witt wrote: I notice it says this on the download page: Mirror network is currently synchronizing. Please try again later. A new release is upcoming. Maybe come back later for the next version of Sage? I don't remember ever seeing either of those messages before. I guess I should wait? Look here for a mirror in your neighbourhood: http://www.sagemath.org/mirrors.html Jaap -Mike -- 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: http://www.sagemath.org To unsubscribe, reply using remove me as the subject.
Re: [sage-support] (1 - i) == -(i + 1) ??
On 04/11/2010 03:05:02 PM, Jaap Spies wrote: Mike Witt wrote: I notice it says this on the download page: Mirror network is currently synchronizing. Please try again later. A new release is upcoming. Maybe come back later for the next version of Sage? I don't remember ever seeing either of those messages before. I guess I should wait? Look here for a mirror in your neighbourhood: http://www.sagemath.org/mirrors.html Ok, downloading now. Thanks again. -- 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: http://www.sagemath.org To unsubscribe, reply using remove me as the subject.
[sage-support] Re: Gap packages
On Apr 10, 9:43 pm, Simon King simon.k...@nuigalway.ie wrote: Hi! On 10 Apr., 15:06, Stochastix laurent.decreusef...@gmail.com wrote: It doesn't seem to be in the optional GAP packages available for SAGE. Can I install it directly in SAGE or should I have a stand-alone installation of GAP ? Sage *has* a stand-alone installation of GAP. If you run sage -gap then this installation will be used. I would try to start a sage shell (i.e., do sage -sh on the command line). Inside this shell, gap is the same as sage -gap. So, it should be possible to install any gap package in exactly the same way as in a Sage-independent installation of GAP. The packages are in SAGE_ROOT/ local/lib/gap-4.4.12/pkg. this certainly does not quite address the question how to compile the executables for this package. Do you have GNU Pascal installed in some way (e.g. via fink?) on your machine? If yes, you might need to modify PATH in the sage shell before doing configure and make... Best, Dmitrii Note that it might then be necessary to update GAP's workspace, in order to make the new package effective: Start Sage, and then do sage: gap_reset_workspace() Best regards, Simon -- 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: http://www.sagemath.org To unsubscribe, reply using remove me as the subject.
[sage-support] Re: Question about numerical linear algebra.
On Apr 11, 1:22 pm, Thierry Dumont tdum...@math.univ-lyon1.fr wrote: -Qusetion: is there some dictionary, some documentation about how the scipy functions are mapped to sage? and what can be directly used? What can be used can be seen by typing A. and hitting Tab key. The documentation for every method is available by entering A.(name of the method)? , for example, A.SVD? and Tab, and the source is available as A.SVD?? and then Tab. Alec -- 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: http://www.sagemath.org To unsubscribe, reply using remove me as the subject.
