保型形式
https://tsujimotter.hatenablog.com/entry/introduction-to-modular-forms-1
https://tsujimotter.hatenablog.com/entry/introduction-to-modular-forms-2
https://speakerdeck.com/unaoya/he-tong-shi-toji-he-xue
https://unaoya-pi.hatenablog.com/entry/automorphic-form