Michael and Sage-devel,

This is happening a lot (see below):

 >  I was trying to create a random matrix with single digit integer
entries using
 >  B = random_matrix(ZZ,100,x=0,x=9)
 >
 >  I get the following error and the worksheet seems to break down after that.
 >  /usr/local/sage/local/bin/sage-sage: line 357:  7881 Illegal instruction

 We really need to find a way to *immediately* report that
"this Sage binary doesn't work on your processor" ASAP instead of after weeks
and only when people push Sage to its limits.

Or we need to build better binaries.  Any ideas?


---------- Forwarded message ----------
From: William Stein <[EMAIL PROTECTED]>
Date: Fri, May 2, 2008 at 8:32 AM
Subject: Re: Does anyone else have this matrix problem
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]


On Thu, May 1, 2008 at 10:49 PM, Anusha Sekar <[EMAIL PROTECTED]> wrote:
 > Hi,
 >
 >  I was trying to create a random matrix with single digit integer
entries using
 >  B = random_matrix(ZZ,100,x=0,x=9)
 >
 >  I get the following error and the worksheet seems to break down after that.
 >  /usr/local/sage/local/bin/sage-sage: line 357:  7881 Illegal instruction
 >  python "$@"
 >

 This means that you downloaded and installed a binary of Sage that
was optimized
 for a different processor than you have in your computer.   E.g., maybe you're
 using an older Pentium, and the binary was built for a much newer one.
 You might try using
   https://sage.math.washington.edu:8102
 for that problem, or building Sage from source, or get a login account
 on sage.math.washington.edu (ask me) or somewhere else that
 has Sage preinstalled.



 >  It breaks down in the sense that all the following cells do not
evaluate at all.
 >
 >  Since the worksheet from class has an example with a 500x500 matrix, I
 >  did not expect to have any problems in finding the determinant of a
 >  100x100. Is it some kind of overflow? Has anyone else had a similar
 >  problem?
 >
 >  Thanks
 >  Anusha
 >
 >  --
 >  Make a difference!
 >  www.ashanet.org/seattle
 >



 --
 William Stein
 Associate Professor of Mathematics
 University of Washington
 http://wstein.org



-- 
William Stein
Associate Professor of Mathematics
University of Washington
http://wstein.org

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