[sage-support] Re: Problems installing Sage 2.1.0.1
On Mon, 12 Feb 2007 04:36:46 -0800, Jack Fearnley wrote: [EMAIL PROTECTED] ~]$ gcc -v Using built-in specs. Target: i386-redhat-linux Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-libgcj-multifile --enable-languages=c,c++,objc,java,f95,ada --enable-java-awt=gtk --with-java-home=/usr/lib/jvm/java-1.4.2-gcj-1.4.2.0/jre --host=i386-redhat-linux Thread model: posix gcc version 4.0.0 20050519 (Red Hat 4.0.0-8) ^^^ There's your problem. To quote from the SAGE README file under SUPPORTED COMPILERS: * WARNING: Don't build with GCC 4.0.0, which is buggy as a Florida swamp in August. GCC 4.0.0 is probably one of the worst possible compilers to have installed. You sould definitely upgrade to 4.0.1, which is much better, then start over from scratch, and probably recompile anything else you've compiled using GCC 4.0.0. -- William --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://sage.math.washington.edu/sage/ and http://sage.scipy.org/sage/ -~--~~~~--~~--~--~---
[sage-support] Re: nth root
- Original Message -
From: Dirk Laurie [EMAIL PROTECTED]
{{{
sage: exp(log(64)/3)
4.0
}}}
Well, that works for the cube root of 64. But note it's 4.0, not 4.
This exposes one to roundoff errors, which the other two methods
avoid.
Well, that can be avoided by increasing the number of digits. Anyway, the
winner is 64.nth_root(3) suggested by Didier Deshommes in another thread.
I'd like to make a suggestion to add th_root method to all domains where
nth_root is implemented, working as 3.th_root(64) in this example, with
aliases st_root, nd_root and rd_root, so that it could be executed as
3.rd_root(64) that looks more natural to me than 64.nth_root(3).
Alec
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[sage-support] Re: nth root
radical(n,body)
On 2/12/07, Alec Mihailovs [EMAIL PROTECTED] wrote:
- Original Message -
From: Dirk Laurie [EMAIL PROTECTED]
{{{
sage: exp(log(64)/3)
4.0
}}}
Well, that works for the cube root of 64. But note it's 4.0, not 4.
This exposes one to roundoff errors, which the other two methods
avoid.
Well, that can be avoided by increasing the number of digits. Anyway, the
winner is 64.nth_root(3) suggested by Didier Deshommes in another thread.
I'd like to make a suggestion to add th_root method to all domains where
nth_root is implemented, working as 3.th_root(64) in this example, with
aliases st_root, nd_root and rd_root, so that it could be executed as
3.rd_root(64) that looks more natural to me than 64.nth_root(3).
Alec
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[sage-support] Re: nth root
For integers, Pari also has an ispower function. I think that it is useful to have an n.is_power(k) member function for integers (or more general for ring elements which admit unique factorization of polynomials), and prefer the syntax n.root(k) rather than n.nth_root(k) --David P.S. Back in 1998, when some of my elliptic curve functions were incorporated into Magma, I naively introduced, or accepted, the syntax nTorsionSubgroup, after which mTorsionSubgroup, and pTorsionSubgroup were introduced to cover all of the natural spellings that users were missing. It took years to drop the nonsensical leading letters and settle on TorsionSubgroup(E,p) rather than the Trinity of [nmp]TorsionSubgroup(E,p). --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://sage.math.washington.edu/sage/ and http://sage.scipy.org/sage/ -~--~~~~--~~--~--~---
