Category:数学のオープンプロブレム

Collatz conjecture

Navier–Stokes existence and smoothness

Hodge conjecture

Moving sofa problem

Pierce–Birkhoff conjecture

Isomorphism problem of Coxeter groups

Beal conjecture

Farrell–Jones conjecture

List of unsolved problems in statistics

Ruth–Aaron pair

L (complexity)

Andrica's conjecture

Conway's 99-graph problem

Erdős–Straus conjecture

Kobon triangle problem

Burnside problem

Class number problem

Yang–Mills existence and mass gap

Smale's problems

Fermat–Catalan conjecture

Lychrel number

Sums of three cubes

Hilbert's problems

List of unsolved problems in mathematics

Millennium Prize Problems

Riemann hypothesis