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D.5.7.1 truncate
Procedure from library sheafcoh.lib (see sheafcoh_lib).
- Usage:
- truncate(M,d); M module, d int
- Assume:
M is graded, and it comes assigned with an admissible degree
vector as an attribute
- Return:
- module
- Note:
- Output is a presentation matrix for the truncation of coker(M)
at degree d.
Example:
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