Opened 13 years ago

Closed 13 years ago

#384 closed bug (wontfix)

interred gives "characteristic too large"

Reported by: steenpass Owned by: somebody
Priority: minor Milestone: 3-1-4 and higher
Component: singular-kernel Version: 3-1-3
Keywords: interred, characteristic Cc:

Description

> ring r = (536870923,t), x, dp;
> ideal i = x, x+1;
> interred(i);
   ? characteristic is too large(max is 2^29)
   ? characteristic is too large(max is 2^29)
   ? error occurred in or before STDIN line 3: `interred(i);`

This does not happen without the parameter:

> ring s = 536870923, x, dp;
> ideal i = x, x+1;
> interred(i);
_[1]=1
> 

I don't see any substantial reason for this. Please note that interred() is used in primdecGTZ(), hence this issue is important when it comes to modular primary decomposition.

Change History (1)

comment:1 Changed 13 years ago by hannes

Resolution: wontfix
Status: newclosed

Computing with rational functions involves (sometimes) computations of gcd of polynomials, which belongs to factory. The limit mentioned is really the limit of factory and only leads to an error, if the calls to gcd really occur.

This limit is well documented and can not be easily changed.

Without the parameter, factory is not involved.

Last edited 13 years ago by hannes (previous) (diff)
Note: See TracTickets for help on using tickets.