|Bill Allombert on Fri, 08 Jun 2012 21:37:45 +0200|
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|ell from j|
Dear PARI developers, It has been suggested to add a function to PARI which return an elliptic curve with a prescribed j-invariant. An example of such function is ellfromj(j)=if(j==0,[0,0,0,0,1],if(j==1728,[0,0,0,1,0],[0,0,0,3,2]*(j/(1728-j)))); How should we call it ? What should it return ? (an ell2,an ell5, a smallell, etc ?) Cheers, Bill.