add compose_mod and powmod with large exp #174
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GiacomoPope
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| cdef nmod_poly res | ||
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| if e < 0: | ||
| raise ValueError("Exponent must be non-negative") |
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Would it make sense to use inverse_mod here?
Or maybe the caller should just do that if needed.
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Yeah good question. I don't think we invert where e is negative elsewhere, but this is a reasonable thing to do.
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Inverting does bring additional complications though because I think then we need the modulus to be irreducible.
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Hopefully addressed the above comments |
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Yep, looks good. Thanks |
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this PR adds two features which i need for a current project:
I'm a little rusty as I haven't thought about flint for a while, and there's one TODO for the
__pow__test as now fmpz_mod_poly does not raise an assertion error when a modulus is given generically