class_group 0.6.0

Rust library for building IQC: cryptography based on class groups (Cl) of imaginary quadratic orders
Documentation 
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Function: permsign
Section: combinatorics
C-Name: permsign
Prototype: lG
Help: permsign(x): signature of the permutation x.
Doc: given a permutation $x$ on $n$ elements, return its signature.
 \bprog
 ? p = Vecsmall([3,1,4,2,5]);
 ? permsign(p)
 %2 = -1
 ? permsign(p^2)
 %3 = 1
 @eprog