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7.7.3.0. Sannfslog
Procedure from library dmod.lib (see dmod_lib).
- Usage:
- Sannfslog(f [,eng]); f a poly, eng an optional int
- Return:
- ring
- Purpose:
- compute the D-module structure of basering[1/f]*f^s
- Note:
- activate the output ring with the
setring command.
In the output ring D[s], the ideal LD1 is generated by the elements
in Ann F^s in D[s], coming from logarithmic derivations.
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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