Talk:Arithmetic Fuchsian group

TODO on this page:

• description of maximal subgroups

• add numerical experiments on the Laplace spectrum of the modular surface (Sarnak, Arithmetic quantum chaos)

• some pages that are linked as "Main article" are not much more developed than the sections here (in particular Selberg's 1/4 conjecture and Quantum ergodicity, they should enhanced (possibly moving the content of this page there)

• add more applications to number theory

• add a section on Takeuchi's arithmeticity criterion and classification of arithmetic triangle groups

jraimbau 10:15, 21 June 2016 (UTC) — Preceding unsigned comment added by Jean Raimbault (talk • contribs)

Is this wrong?

The section Isospectral surfaces contains this sentence:

"Vignéras then constructed explicit instances for $A,{\mathcal {O}}_{1},{\mathcal {O}}_{2}$ satisfying the conditions above and such that in addition ${\mathcal {O}}_{2}$ is not conjugated by an element of $A$ to ${\mathcal {O}}_{2}.$"

Can we assume that the last instance of "${\mathcal {O}}_{2}.$" should actually be "${\mathcal {O}}_{1}.$'"? 2601:200:C000:1A0:90E6:F29F:F511:B9ED (talk) 20:00, 8 June 2021 (UTC)

Thanks for noticing this, i fixed it. jraimbau (talk) 13:00, 9 June 2021 (UTC)