Mak Trifkovic on Wed, 27 Sep 2006 07:23:19 +0200

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p-adic elliptic curves

I'm trying to initialize 17A1`over Q_17, by typing, for various values of i,

ellinit([1, -1, 1, -1, -14]*(1+O(17^i)].

For i<=4, I get the error message 'singular curve in initell'.

For 5<=i<=12, I get the error message 'insufficient precision in initell'.

What is going on here? Is there a formula to determine the minimum precision required?