John Cremona on Fri, 11 Jan 2002 08:33:02 +0000 |
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Re: Mordell Weil generator for y^2=x^3+7823 |
(In response to Igor's posting) There are two normalizations of heights in use. The one which gives 77.6 is one; Pari uses the other for heights, though makes the adjustment for the height pairing (so as to give appropriate values for Birch-Swinnerton-Dyer applications). Put another way, although Pari's height for this point is 77.6/2=38.8, its value for the height pairing is 77.6. John -- Prof. J. E. Cremona | University of Nottingham | Tel.: +44-115-9514920 School of Mathematical Sciences | Fax: +44-115-9514951 University Park | Email: John.Cremona@nottingham.ac.uk Nottingham NG7 2RD, UK |