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D.6.13.7 is_reg
Procedure from library sing.lib (see sing_lib).
- Usage:
- is_reg(f,id); f poly, id ideal or module
- Return:
- 1 if multiplication with f is injective modulo id, 0 otherwise
- Note:
- Let R be the basering and id a submodule of R^n. The procedure checks
injectivity of multiplication with f on R^n/id. The basering may be a
quotient ring.
Example:
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