nfgaloisconj

macsyma on Fri, 26 Jul 2019 03:24:01 +0200

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nfgaloisconj

To: "pari-users@pari.math.u-bordeaux.fr" <pari-users@pari.math.u-bordeaux.fr>
Subject: nfgaloisconj
From: macsyma <macsyma@yahoo.co.jp>
Date: Fri, 26 Jul 2019 10:23:53 +0900 (JST)
References: <1680813035.1680228.1564104233521.JavaMail.yahoo.ref@jws704107.mail.ssk.yahoo.co.jp>

For many f, nfgaloisconj(nfsplitting(f)) is very fast.
But for some f (e.g. x^6 - x^5 - x^2 + x + 1, x^17 - 2, ...), it seems to be not so fast.
Is there a better way to get the polynomial representation of Galois automorphisms for such f ?

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