Re: [sage-support] Re: Real symbolic variable

Sorry for m'y repeated mails. I do not want to do that. I beg your pardon. Le 30 janv. 2015 20:05, "Lee Worden" a écrit : > > On Thursday, January 29, 2015 at 10:17:32 PM UTC-8, Vegard Lima wrote: > >> But I think that was my point... >> >> If you do something like this >> >> sage: a = var('a',la

Re: [sage-support] Re: What is right multiplication of vector spaces by matrices?

Hi Peter, > The bug is caused by FreeModule_generic._mul_(): Cool! You got the bug. Did you opened a ticket? If you do so, please cc'me. Vincent -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving

[sage-support] Re: What is right multiplication of vector spaces by matrices?

Hello, The bug is caused by FreeModule_generic._mul_(): def _mul_(self, other, switch_sides=False): if switch_sides: return self.span([v * other for v in self.basis()]) return self.span([other * v for v in self.basis()]) It looks like the effect of the switch_sides flag is exactl

Re: [sage-support] What is right multiplication of vector spaces by matrices?

Indeed sage: V.subspace([x*v]) == V.subspace([v])*x True Sage matrices are allow indifferently on vectors from left to right. But of course, the action is not the same but there is no row vectors vs column vectors. sage: v*x (1, 1) sage: x*v (1, 0) Your example shows that when acting on subspac

Re: [sage-support] Re: Real symbolic variable

On Thursday, January 29, 2015 at 10:17:32 PM UTC-8, Vegard Lima wrote: > But I think that was my point... > > If you do something like this > > sage: a = var('a',latex_name='BLAH') > > and then > > sage: a = var('a') > > sage: latex(a) > BLAH > > So the first a=var(...) did have an impact

[sage-support] Re: Interface to Mathematica

Unfortunately, this is a known issue http://trac.sagemath.org/ticket/13892 It has to do with a change they made in Mathematica 9. Personally, my work-around is just to use Mathematica 8, though someone has proposed an actual fix that has not yet been incorporated into Sage: http://trac.sagema

[sage-support] Interface to Mathematica

Hello, I am right now working on someone's package that requires calling Mathematica. Right now, under the directory, I can use "math" to call Mathematic

[sage-support] Re: temporarily disappearing(?) of a file triggers a detach

> > afair there is already a timeout (for attach). You could add an optional > argument attach(..., timeout=1000) > > Cannot confirm. If there is a timeout, it is probably hardcoded; there is no optional argument for attach. Opened a ticket: http://trac.sagemath.org/ticket/17698#ticket @Volker

[sage-support] What is right multiplication of vector spaces by matrices?

After hours of debugging some program code, I found out that right multiplication of a row subspace of K^n by an element x from GL(n,K) does *not* do what I expected! sage: V = GF(2)^2 sage: v = V((1,0)) sage: x = GL(2,2)(matrix([[1,1],[0,1]])) sage: V.subspace([v*x]) == V.subspace([v])*x False

Re: [sage-support] Re: issue in the Singular interface or in Singular

> > Note that already > > sage: (1/(b*zzz))._singular_() > 0 > opened a ticket: http://trac.sagemath.org/ticket/17696#ticket -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it,

Re: [sage-support] Issue in running SAGE 6.4.1

Hello, I am afraid that if the binaries are not available on http://sagemath.org you will need to compile sage by yourself. Have a look at http://sagemath.org/doc/installation/source.html Vincent 2015-01-30 10:55 UTC+01:00, Wai Man Chung : > Hi Vincent, > > Thanks for your reply. > > Your first

Re: [sage-support] Issue in running SAGE 6.4.1

Hi Vincent, Thanks for your reply. Your first question already remind me of the mistake I make. The file name I download is "sage-6.4.1-i686-Linux-Ubuntu_13.04_i686.tar.lzma", which ought to be for Ubuntu. My PC is of 32 bit and so I am looking for the 32-bit version. I find in SAGE web site tha