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I used a Heuristic approach to narrow down the list of elliptic curves for which ρ2,E is surjective mod 2 but not mod 4 or ρ2,E is surjective mod 4 but not mod. 2not4or4not8v3.sage

The results of the above program for 2not4 curves is li4.sobj 2not4 output.txt

I have verified the results of 2not4 list, using a Galois approach, which involves compute the order of the Gal(Q(E[4])/Q). The program I used is 2not4galoisapproachv2.sage

The results of the above program for 4not8 curves is li8.sobj

I am working on verifying this result using the Galois approach.

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GaganSekhon (last edited 2022-04-11 03:49:39 by mkoeppe)