Algorithms for modular elliptic curves
Algorithms for modular elliptic curves
Periods of Cusp forms and elliptic curves over imaginary quadratic fields
Mathematics of Computation
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Let F be a real quadratic field with ring of integers O andwith class number 1. Let Γ be a congruence subgroup of GL2(O). Wedescribe a technique to compute the action of the Hecke operators on thecohomology H3(Γ;C). For F real quadratic this cohomology group containsthe cuspidal cohomology corresponding to cuspidal Hilbert modularforms of parallel weight 2. Hence this technique gives a way to computethe Hecke action on these Hilbert modular forms.