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D.5.7.2 truncateFast
Procedure from library sheafcoh.lib (see sheafcoh_lib).
- Usage:
- truncateFast(M,d); M module, d int
- Assume:
M is graded, and it comes assigned with an admissible degree
vector as an attribute 'isHomog'
- Return:
- module
- Note:
- Output is a presentation matrix for the truncation of coker(M)
at d.
Fast + experimental version. M shoud be a SB!
- Display:
- If
printlevel >=1, step-by step timings will be printed.
If printlevel >=2 we add progress debug messages
if printlevel >=3, even all intermediate results...
Example:
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