Ramanujan–Petersson conjecture

E355436

The Ramanujan–Petersson conjecture is a fundamental statement in number theory and the theory of modular forms that predicts strong bounds on the Fourier coefficients of modular cusp forms, with deep connections to automorphic forms and the Langlands program.

All labels observed (7)

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Statements (47)

Predicate Object
instanceOf conjecture in number theory ⓘ
mathematical conjecture ⓘ
concerns Hecke eigenforms ⓘ
holomorphic cusp forms of weight k for SL(2,Z) ⓘ
connectedTo eigenvalues of the Laplacian on modular curves ⓘ
spectral theory of automorphic forms ⓘ
equivalentTo temperedness of local components of automorphic representations of GL(2) ⓘ
extendedBy Petersson’s work on Fourier coefficients of cusp forms ⓘ
field number theory ⓘ
theory of modular forms ⓘ
formulatedInContextOf Hecke eigenforms with multiplicative Fourier coefficients ⓘ
modular forms for SL(2,Z) ⓘ
generalizationOf Ramanujan conjecture for the tau function ⓘ
hasConsequence improved error terms in arithmetic counting problems ⓘ
subconvexity bounds for certain L-functions ⓘ
hasLocalForm bounds on Satake parameters ⓘ
historicalOrigin Ramanujan’s 1916 conjectures on the tau function ⓘ
holdsFor holomorphic cusp forms of any integral weight k ≥ 2 ⓘ
implies Fourier coefficients of normalized Hecke eigenforms are bounded by n^{(k-1)/2+ε} ⓘ
inspired generalized Ramanujan–Petersson conjecture for GL(n) ⓘ
language algebraic geometry ⓘ
complex analysis ⓘ
representation theory ⓘ
motivation understanding arithmetic properties of modular forms ⓘ
namedAfter Hans Petersson ⓘ
Srinivasa Ramanujan ⓘ
openVariant generalized Ramanujan conjecture for Maass forms ⓘ
predicts Deligne bound for Fourier coefficients of modular forms ⓘ
growth conditions on Fourier coefficients ⓘ
strong bounds on Fourier coefficients of cusp forms ⓘ
proofUses Weil conjectures ⓘ
étale cohomology ⓘ
proofYear 1974 ⓘ
provedBy Pierre Deligne ⓘ
relatedProblem Selberg eigenvalue conjecture ⓘ
relatedTo Hecke operators ⓘ
Langlands program ⓘ
Ramanujan tau function ⓘ
automorphic forms ⓘ
generalized Ramanujan conjecture ⓘ
status proved for holomorphic modular forms of integral weight ⓘ
subject Fourier coefficients of cusp forms ⓘ
Fourier coefficients of modular forms ⓘ
type growth conjecture ⓘ
usedIn analytic number theory ⓘ
bounds for exponential sums ⓘ
estimates for L-functions ⓘ

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Referenced by (7)

Full triples — surface form annotated when it differs from this entity's canonical label.

Srinivasa Ramanujan → notableWork → Ramanujan–Petersson conjecture ⓘ
Ramanujan tau function → satisfies → Ramanujan–Petersson conjecture (proved by Deligne) ⓘ
linked to: Ramanujan–Petersson conjecture
Ramanujan tau function → relatedTo → Ramanujan conjectures ⓘ
linked to: Ramanujan–Petersson conjecture
Ramanujan–Petersson conjecture → relatedTo → generalized Ramanujan conjecture ⓘ
linked to: Ramanujan–Petersson conjecture
Ramanujan–Petersson conjecture → generalizationOf → Ramanujan conjecture for the tau function ⓘ
linked to: Ramanujan–Petersson conjecture
Ramanujan–Petersson conjecture → inspired → generalized Ramanujan–Petersson conjecture for GL(n) ⓘ
linked to: Ramanujan–Petersson conjecture
Langlands program → hasPart → Ramanujan–Petersson conjecture (automorphic form version) ⓘ
linked to: Ramanujan–Petersson conjecture