ASKSAGE: Sage Q&A Forum - RSS feedhttps://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Sun, 15 Dec 2013 07:35:29 +0100Matrix of Frobenius action on the de Rham cohomology of a curve.https://ask.sagemath.org/question/8079/matrix-of-frobenius-action-on-the-de-rham-cohomology-of-a-curve/I'd like to be able to compute the matrix of Frobenius action on the de Rham cohomology of a curve in characteristic p. Has this been implemented in SAGE?
I couldn't find anything in the documentation, or googling for papers which compute this. Also, computation of the Hasse Witt Matrix has been implemented.Mon, 18 Apr 2011 19:58:19 +0200https://ask.sagemath.org/question/8079/matrix-of-frobenius-action-on-the-de-rham-cohomology-of-a-curve/Answer by John Cremona for <p>I'd like to be able to compute the matrix of Frobenius action on the de Rham cohomology of a curve in characteristic p. Has this been implemented in SAGE? </p>
<p>I couldn't find anything in the documentation, or googling for papers which compute this. Also, computation of the Hasse Witt Matrix has been implemented.</p>
https://ask.sagemath.org/question/8079/matrix-of-frobenius-action-on-the-de-rham-cohomology-of-a-curve/?answer=15816#post-id-15816See [this section of the reference manual](http://www.sagemath.org/doc/reference/plane_curves/sage/schemes/elliptic_curves/monsky_washnitzer.html) but note that it says "Currently this code is limited to the case p?5 (no GF(pn) for n>1), and only handles the elliptic curve case (not more general hyperelliptic curves)."Sun, 15 Dec 2013 07:35:29 +0100https://ask.sagemath.org/question/8079/matrix-of-frobenius-action-on-the-de-rham-cohomology-of-a-curve/?answer=15816#post-id-15816