Opened 13 years ago

Closed 13 years ago

#235 closed bug (duplicate)

bug in multivariate factorization

Reported by: mlee Owned by: mlee
Priority: minor Milestone: 3-1-2 and higher
Component: libfac Version: 3-1-1
Keywords: multivariate factorization Cc:


Dear Singular-Team,

in Sage, I occasionally experienced a crash when doing multivariate polynomial factorisation with coefficients GF(2). "Occasionally" means that one and the same example sometimes works and sometimes doesn't. The probability of it occurring seems to increase if there was previously a KeyboardInterrupt?.

The "last words" before the crash are: convertFacCF2NTLGF2X: coefficient not immidiate!

So, why am I writing this here? The error seems to be known to the macaulay2 list (and they have a reproducibly failing example):

There, Dan Grayson wrote: """ The error message comes from Singular Libfac, the library from Singular written by Michael Messollen that computes characteristic series. It might be a bug in that library, since if I try replacing 2 by 101, there is no problem like this. """

Assuming that Dan is right and the error is from Singular: Are you aware of this bug? Will it be resolved in the next release?

Best regards, Simon

Change History (2)

comment:1 Changed 13 years ago by mlee

Owner: changed from hannes to mlee

comment:2 Changed 13 years ago by hannes

Resolution: duplicate
Status: newclosed

see #131

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