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A way to compute
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A way to compute
Compute
to precision
using, e.g., modular symbols, then use a Smith Normal Form algorithm.
William A Stein 2002-09-29
![$ S_2(\Gamma_0(N),\mathbf{Z})\subset \mathbf{Z}[[q]]$](img32.png)
to
precision
![$ [\SL_2(\mathbf{Z}):\Gamma_0(N)]/6$](img33.png)
using, e.g., modular
symbols, then use a Smith Normal Form algorithm.
