ASKSAGE: Sage Q&A Forum - Individual question feedhttp://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Fri, 26 Oct 2018 16:22:16 -0500Define a modular form from its $q$-expansion coefficientshttp://ask.sagemath.org/question/44072/define-a-modular-form-from-its-q-expansion-coefficients/I have a certain modular form for $\Gamma(N)$ and weight $0$ which I know but just by it's $q$-expansion coefficients, and I want to compute the action of Hecke operators on this modular form. How do I define a modular form object from its q-expansion coefficients, so that I can use it as an input for M.hecke_operator?Thu, 25 Oct 2018 20:34:33 -0500http://ask.sagemath.org/question/44072/define-a-modular-form-from-its-q-expansion-coefficients/Comment by dan_fulea for <p>I have a certain modular form for $\Gamma(N)$ and weight $0$ which I know but just by it's $q$-expansion coefficients, and I want to compute the action of Hecke operators on this modular form. How do I define a modular form object from its q-expansion coefficients, so that I can use it as an input for M.hecke_operator?</p>
http://ask.sagemath.org/question/44072/define-a-modular-form-from-its-q-expansion-coefficients/?comment=44090#post-id-44090Please give us the N and the first coefficients. Else there is hard to give a pointed answer.Fri, 26 Oct 2018 16:22:16 -0500http://ask.sagemath.org/question/44072/define-a-modular-form-from-its-q-expansion-coefficients/?comment=44090#post-id-44090