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pureFree -- computes an GL(V)-equivariant map whose resolution is pure, or the reduction mod p of such a map

Synopsis

Description

i1 : betti res coker pureFree({0,1,2,4},QQ^3) -- degree sequence {0,1,2,4}

            0 1 2 3
o1 = total: 3 8 6 1
         0: 3 8 6 .
         1: . . . 1

o1 : BettiTally
i2 : betti res coker pureFree({0,1,2,4},QQ^3,2) -- same map, but reduced mod 2

            0 1 2 3
o2 = total: 3 8 6 1
         0: 3 8 6 .
         1: . . . 1

o2 : BettiTally

See also

Ways to use pureFree :