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 |
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