Jeroen Demeyer on Tue, 09 Jun 2015 16:02:55 +0200

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qfisom over Q

Dear pari-users,

In qfisom, I am guessing that the isomorphism is supposed to be defined over Z, i.e. the transformation matrix is unimodular. This is not so clear from reading ??qfisom.

Is there any way to do this computation over Q, i.e. allowing the transformation matrix to be any non-singular rational matrix?