Basel problem
article-link
What links here
Congruence subgroup
Domain (ring theory)
article-link
Discrete group
article-link
Theta function
article-link
Dedekind eta function
article-link
Klein quartic
article-link
List of number theory topics
article-link
List of Lie groups topics
article-link
Modular group
article-link
Orbifold
article-link
Modular form
article-link
List of unsolved problems in mathematics
article-link
Symplectic group
article-link
List of group theory topics
article-link
Congruence
article-link
Gamma
article-link
Fundamental group
article-link