PARI:Failure of ellheight on elliptic curve [0,-1,0,-784,8704] for LINUX

Martin Prickett on Thu, 5 Jul 2001 18:14:52 +0100 (BST)

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PARI:Failure of ellheight on elliptic curve [0,-1,0,-784,8704] for LINUX only

To: pari-dev@list.cr.yp.to
Subject: PARI:Failure of ellheight on elliptic curve [0,-1,0,-784,8704] for LINUX only
From: Martin Prickett <pmxpm@maths.nottingham.ac.uk>
Date: Thu, 5 Jul 2001 18:14:52 +0100 (BST)

I am Martin Prickett, a phD student of John Cremona at Nottingham. I am
using PARI and have discovered that if I take curve
e=ellinit([0,-1,0,-784,8704]) and point P=[-8,120] then
ellheight(e,P) crashes the computer by causing it to run out of memory on
Linux machines. However on Dec alpha machines (which are 64 bit) it gives
the correct answer.

I can run ellheight(e,P,1) which runs the Tate method of calculating
canonical heights instead of the theta function method on my Linux machine
but this takes ages to run.

Can anyone help with this?

Many thanks,

Martin Prickett
pmxpm@maths.nottingham.ac.uk

Follow-Ups:
- Re: PARI:Failure of ellheight on elliptic curve [0,-1,0,-784,8704]
  - From: Bill Allombert <allomber@math.u-bordeaux.fr>

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