Langlands program

The Langlands Program is a branch of algebraic number theory. It is a more complicated version of class field theory.

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v t e L-functions in number theory
Analytic examples	Riemann zeta function Dirichlet L-functions L-functions of Hecke characters Automorphic L-functions Selberg class
Algebraic examples	Dedekind zeta functions Artin L-functions Hasse–Weil L-functions Motivic L-functions
Theorems	Analytic class number formula Riemann–von Mangoldt formula Weil conjectures
Analytic conjectures	Riemann hypothesis Generalized Riemann hypothesis Lindelöf hypothesis Ramanujan–Petersson conjecture Artin conjecture
Algebraic conjectures	Birch and Swinnerton-Dyer conjecture Deligne's conjecture Beilinson conjectures Bloch–Kato conjecture Langlands conjecture
p-adic L-functions	Main conjecture of Iwasawa theory Selmer group Euler system