Subject
Algebra and Number Theory
Reference10 articles.
1. Understanding groups like Γ0(N);Conway,1996
2. C.J. Cummins, Congruence subgroups of groups commensurable with PSL(2,Z) of genus 0 and 1, preprint
3. Modular equations and the genus zero property of moonshine functions;Cummins;Invent. Math.,1997
4. Monstrous moonshine;Conway;Bull. London Math. Soc.,1979
5. Bestimmung der Kommensurabilitätsklasse der Hilbertschen Moulgruppe;Helling;Math. Z.,1966