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Improve InverseMatMod with integer modulus #2426

Merged
merged 1 commit into from
May 4, 2018
Merged

Improve InverseMatMod with integer modulus #2426

merged 1 commit into from
May 4, 2018

Commits on Apr 30, 2018

  1. Improve InverseMatMod with integer modulus 

    Before:

    gap> m2:=RandomUnimodularMat(100);;
    gap> for i in [1..100] do x:=InverseMatMod(m2,2); od; time;
    277
    gap> for i in [1..100] do x:=InverseMatMod(m2,251); od; time;
    1564
    gap> for i in [1..100] do x:=InverseMatMod(m2,65537); od; time;
    Error, reached the pre-set memory limit

After:

    gap> m2:=RandomUnimodularMat(100);;
    gap> for i in [1..100] do x:=InverseMatMod(m2,2); od; time;
    273
    gap> for i in [1..100] do x:=InverseMatMod(m2,251); od; time;
    1249
    gap> for i in [1..100] do x:=InverseMatMod(m2,65537); od; time;
    1226
    @fingolfin
    fingolfin committed Apr 30, 2018
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