Unable to provide options to QEPCAD besides the number of cells

[maxale]

Problem Description

Sage's QEPCAD interface provide a parameter memcells= to qepcad() function, however this corresponds to just one (+N) of a few options that can be adjusted:

$ ./qepcad +h
Usage:
  ./qepcad <SACLIB options>

SACLIB Options:
  +h     : print this usage information.
  +N<n>  : NU      <- <n>.  default = 1000000
  +Np<n> : NUp     <- <n>.  default = 20000
  +G<n>  : GCM     <- <n>.  default = 0
  +R<n>  : RHO     <- <n>.  default = 10
  +S<n>  : NSPRIME <- <n>.  default = 500
  +M<n>  : NMPRIME <- <n>.  default = 2000
  +L<n>  : NLPRIME <- <n>.  default = 2000
  +T<n>  : NPTR1   <- <n>.  default = 2001

Currently there is no official way to change the others.

Proposed Solution

Maybe a general options= parameter can be added to qepcad() to allow the user providing arbitrary options to QEPCAD.

Alternatives Considered

Currently, a workaround is to use the hack with specifying memcells= as a string starting with the value for +N followed by any other options, e.g. qepcad(..., memcells='2000000 +L3000'):

sage: from sage.interfaces.qepcad import _qepcad_cmd
sage: _qepcad_cmd(memcells='2000000 +L3000')
'env qe=/usr/local/sage/sage/local qepcad +N2000000 +L3000'

Additional Information

No response

Is there an existing issue for this?

• I have searched the existing issues for a bug report that matches the one I want to file, without success.