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7.7.3.0. annfs2
Procedure from library dmod.lib (see dmod_lib).

Usage:
annfs2(I, F [,eng]); I an ideal, F a poly, eng an optional int

Return:
ring

Purpose:
compute the annihilator ideal of f^s in the Weyl Algebra,
based on the output of Sannfs-like procedure
annfs2 uses shorter expressions in the variable s (the idea of Noro).

Note:
activate the output ring with the setring command. In this ring,
- the ideal LD (which is a Groebner basis) is the annihilator of f^s,
- the list BS contains the roots with multiplicities of the BS polynomial.
If eng <>0, std is used for Groebner basis computations,
otherwise and by default slimgb is used.

Display:
If printlevel=1, progress debug messages will be printed,
if printlevel>=2, all the debug messages will be printed.

Example:
 


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            User manual for Singular version 3-1-6, Dec 2012, generated by texi2html.