[CLN-list] Bug in F_2[X] comparisson
Remco Bloemen
remco.bloemen at gmail.com
Wed Oct 31 01:16:32 CET 2007
Dear all,
Lately i have been implementing a few algorithms from "Modern Computer
Algebra". In the process of implementing Z[x] factorization i noticed the
following strange behavior:
cl_modint_ring basering = find_modint_ring(2);
cl_univpoly_modint_ring ring = find_univpoly_ring(basering);
cl_UP_MI x= ring->zero();
(x != ring->zero()) returns false (correct)
(x == ring->zero()) returns false (incorrect)
If i first compare x == x the behavior changes:
(x == x) returns true (correct)
(x != ring->zero()) returns true (incorrect)
(x == ring->zero()) returns false (incorrect)
Attached is a demonstrational program. I'm using cln version 1.1.13 compiled
with gcc-4.2.2 on x86 (prescott).
Could someone please tell me if this is fixed in cvs or being worked on?
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