Extension of John Cremona's ECLIB code to allow a quadratic character
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eclib_with_quadchar

Extension of John Cremona's ECLIB code to allow a quadratic character.

This is an extension/enhancement of John Cremona's ECLIB C++ programs to allow one to compute systems of Hecke eigenvalues for weight 2 modular forms for Gamma_0(N) and any primitive even quadratic character chi. The character is defined by specifying the numerator chi_top of the Kronecker symbol, i.e. chi(d) := (chi_top/d).