I am sending this to sage-support.... On Thursday, February 18, 2010, Joerg Arndt <[email protected]> wrote: > The following doesn't finish in reasonable time: > ------------------------ > var('E1, E2, E4, E5, E10, E20'); > var( 'q' ); > t=(E20^16*E5^8*q^4*E2^24 + (-E20^16*E5^8*q^4*E4^8*E1^16 + (-E10^24 + > E20^8*E5^16)*E4^16*E1^8)) > factor(t) > ------------------------ > > Session: > % time sage < bug.sage > ---------------------------------------------------------------------- > | Sage Version 4.3.2, Release Date: 2010-02-06 | > | Type notebook() for the GUI, and license() for information. | > ---------------------------------------------------------------------- > ## (hitting ctrl-Z here as ctrl-C doesn't have any effect) > sage: Exiting SAGE (CPU time 1m19.28s, Wall time 1m21.25s). > % kill %1 > /opt/sage/sage < bug.sage 81.03s user 0.84s system 94% cpu 1:26.67 total > ## (note: job doesn't finish within 10 minutes either) > > > IIRC versions 3.* of sage did not have this problem. > > Note: use ginac's routine, it should be quite fast. > > > system info: > > Sage 4.3.2 as compiled from source. > > % cat /etc/SuSE-release > openSUSE 10.3 (X86-64) > VERSION = 10.3 > > % gcc -v > Using built-in specs. > Target: x86_64-suse-linux > Configured with: ../configure --enable-threads=posix --prefix=/usr > --with-local-prefix=/usr/local --infodir=/usr/share/info > --mandir=/usr/share/man --libdir=/usr/lib64 --libexecdir=/usr/lib64 > --enable-languages=c,c++,objc,fortran,obj-c++,java,ada > --enable-checking=release --with-gxx-include-dir=/usr/include/c++/4.2.1 > --enable-ssp --disable-libssp --disable-libgcj --with-slibdir=/lib64 > --with-system-zlib --enable-shared --enable-__cxa_atexit > --enable-libstdcxx-allocator=new --disable-libstdcxx-pch > --program-suffix=-4.2 --enable-version-specific-runtime-libs > --without-system-libunwind --with-cpu=generic --host=x86_64-suse-linux > Thread model: posix > gcc version 4.2.1 (SUSE Linux) >
-- William Stein Associate Professor of Mathematics University of Washington http://wstein.org -- To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
