Category:数学のオープンプロブレム

Collatz conjecture

Erdős–Straus conjecture

Yang–Mills existence and mass gap

Ruth–Aaron pair

Hilbert's problems

Pierce–Birkhoff conjecture

Smale's problems

Conway's 99-graph problem

Sums of three cubes

Isomorphism problem of Coxeter groups

L (complexity)

Farrell–Jones conjecture

Burnside problem

Class number problem

Andrica's conjecture

Kobon triangle problem

Lychrel number

Fermat–Catalan conjecture

Beal conjecture

Moving sofa problem

List of unsolved problems in statistics

Hodge conjecture

Navier–Stokes existence and smoothness

List of unsolved problems in mathematics

Riemann hypothesis

Millennium Prize Problems