On 2020-06-15 10:58, 'Paul Mercat' via sage-devel wrote:
> Hi !
>
> Sage doesn't compute correctly the matrix of a Permutation:
>
> matrix(Permutation('(1,2,3,4)'))
>
> return a wrong answer: it returns the inverse of the correct result.
> The product of matrices of permutations must be equal to the matrix of
> the composition.
>
Since the inverse is the transpose in this case, this is probably just
the result of one person having left-application in mind and another
having right-application in mind. The documentation doesn't say which
one you'll get; that should be changed too.
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