|Bill Allombert on Fri, 6 Jul 2001 10:20:29 +0200|
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|Re: PARI:Failure of ellheight on elliptic curve [0,-1,0,-784,8704]|
On Thu, Jul 05, 2001 at 06:14:52PM +0100, Martin Prickett wrote: > 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. First I suppose your Linux machine is a x86 ? I try this on a x86 Linux machine and on a sparc solaris machine and I got. *** the PARI stack overflows ! current stack size: 33554432 (32.000 Mbytes) which is not a computer crash, just a stack overflow condition. I also try it on a alpha Linux machine and it work ? ellheight(e,P) %3 = 0.74629920869451370890943760363155317690 So you are right is a 32bit-only issue. Cheers, Bill.