longestPerm n
Given an integer $n$, returns the permutation $\{n,n-1,...2,1\}$.
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The object longestPerm is a method function.
The source of this document is in /build/reproducible-path/macaulay2-1.25.06+ds/M2/Macaulay2/packages/MatrixSchubert/permutationMethodsDOC.m2:157:0.