Solved Problems
- (0,1)-Matrix
- 1-2-3 Conjecture
- Aaronson-Ambainis Conjecture
- Abhyankar's Conjecture
- Acyclic Digraph
- Alternating Sign Matrix Conjecture
- Amari-Kobayashi Conjecture
- Aperiodic Monotile
- Aperiodic Tiling
- Archimedes' Cattle Problem
- Artin-Davenport Conjecture
- Auluck-Chowla-Gupta Conjecture
- Baernstein Quasi-Norm Monotonicity Conjecture
- Barnette's Conjecture
- Baudet's Conjecture
- Beck-Fiala Conjecture
- Bellows Conjecture
- Bennequin's Conjecture
- Beraha Constants
- Bessis-Moussa-Villani Conjecture
- Bialostocki-Lotspeich Conjecture
- Bieberbach Conjecture
- Bimagic Square
- Biwheel Conjecture
- Blaschke Conjecture
- Bollobás-Nikiforov Conjecture
- Boolean Pythagorean Triples Problem
- Borisenko Conjecture
- Borisov-Nuer Conjecture
- Bourget's Hypothesis
- Brandt Conjecture
- Brennan's Conjecture
- Burnside's Conjecture
- Burr-Erdős Conjecture
- Burr-Erdős-Graham-Sós Conjecture
- Busemann-Petty Problem
- Calabi Conjecture
- Cameron-Erdős Conjecture
- Canonical van der Waerden Number
- Carmichael's Conjecture
- Catalan's Conjecture
- Central Binomial Coefficient
- Central Configuration
- Colombo's Determinant Problem
- Conway's Knot
- Courtade-Kumar Conjecture
- Cover-Free Family
- Crouzeix's Conjecture
- Cube Line Picking
- Deligne-Drinfeld Conjecture
- Density Hales-Jewett Theorem
- Digit
- Directed Erdős-Sós Theorem
- Dodecahedral Conjecture
- Douady's Conjecture
- Double Bubble
- Duffin-Schaeffer Conjecture
- Dyson's Conjecture
- Ehrhart Volume Conjecture
- English Draughts
- Entropy Conjecture
- Epsilon Conjecture
- Erdős Discrepancy Problem
- Erdős-Fuchs Theorem
- Erdős-Gallai Cycle Decomposition Conjecture
- Erdős-Gallai-Tuza Conjecture
- Erdős-Graham Subset Sum Problem
- Erdős-Heilbronn Conjecture
- Erdős-Menger Theorem
- Erdős-Mirsky Conjecture
- Erdős-Nicolas-Sárközy Conjecture
- Erdős Primitive Set Conjecture
- Erdős-Sós Theorem
- Erdős Squarefree Conjecture
- Erdős-Szemerédi Sunflower Conjecture
- Eternity
- Euler Conductor
- Exact Overlaps Conjecture
- Factorial Square Product
- Feige's Conjecture
- Fermat's Last Theorem
- Fishburn Latent-Subset Conjecture
- Flyping Conjecture
- Four-Color Theorem
- FoxTrot Series
- Fractional Lane-Emden Conjecture
- Gao Constant
- Gauss's Class Number Conjecture
- Gaussian Moat Problem
- Gelfand's Question
- Gelfond's Theorem
- Generalized Hypergraph 4-Cycle
- Graham's GCD Problem
- Graphic Additive Base Conjecture
- Green-Tao Theorem
- Haberdasher's Problem
- Hadjicostas's Formula
- Harary-Hill Conjecture
- Heawood Conjecture
- Hilbert's Problems
- Hilbert's Seventeenth Problem
- Hilbert's Tenth Problem
- Hilbert Transform-UMD Constant Dependence Problem
- Hindman's Theorem
- Hofstadter-Conway $10,000 Sequence
- Honeycomb Conjecture
- Hundred-Dollar, Hundred-Digit Challenge Problems
- Janson-Sós Conjecture
- Jevons' Number
- Jordan Curve Theorem
- Kahn's Flow Conjecture
- Kalai's Conjecture for Tight Trees
- Kannan-Lovász-Simonovits Conjecture
- Kaplan-Yorke Conjecture
- Kato Problem
- Keevash-Mubayi Simplex-Cluster Conjecture
- Kepler Conjecture
- Kneser's Conjecture
- Kohayakawa-Prömel-Rödl Conjecture
- Komlós Conjecture
- Kronecker-Weber Theorem
- Kroó Homogeneous Polynomial Approximation Conjecture
- Kung-Traub Conjecture
- Kuperberg's Six-Cylinder Conjecture
- Laczkovich Lipschitz Mapping Problem
- Lam's Problem
- Langberg-Médard Conjecture
- Laplacian S_n,n Conjecture
- Linear Hadwiger Conjecture
- Littlewood's Cylinder Problem
- Littlewood's Exponential Sum Problem
- Lovász-Plummer Conjecture
- Macdonald's Constant-Term Conjecture
- Macdonald's Plane Partition Conjecture
- Magic Configuration
- Magic Tour
- Matchstick Graph
- McLaughlin Geometry
- McLeod Conjecture
- Middle Levels Conjecture
- Milin Conjecture
- Millennium Prize Problems
- Milnor's Conjecture
- Minimum Number of Determined Circles
- Mirsky-Newman Theorem
- Mordell Conjecture
- Moser's Cube Problem
- Moving Sofa Problem
- Muckenhoupt C_p Conjecture
- Murty-Simon Conjecture
- Netto's Conjecture
- Nirenberg's Conjecture
- Norine's Antipodal-Coloring Conjecture
- Octahedron Tetrahedron Picking
- Pansu Conjecture
- Perfect Graph Theorem
- Perfect Magic Cube
- Petersson Conjecture
- Phelps-Rodriguez Conjecture
- Pi Formulas
- Pisanski Conjecture
- Poincaré Conjecture
- Polynomial Littlewood-Offord Problem
- Positive Eigenvalued Matrix
- Power Series
- Prellberg-Stanton Conjecture
- Prime Arithmetic Progression
- Prime Magic Square
- Prime Number Theorem
- Projective Plane Crossing Number
- Quantum Parallel Repetition
- Ramanujan's Square Equation
- Rational Exponents Conjecture
- Reciprocal Fibonacci Constant
- Refined Alternating Sign Matrix Conjecture
- Reiner-Stanton-White Conjecture
- Rhombic Dodecahedral Conjecture
- Road Coloring Problem
- Robbins Conjecture
- Robertson Conjecture
- Rohrbach's Conjecture
- Rubik's Cube
- Rudin's Homogeneous Basis Problem
- Ruth-Aaron Pair
- Ruzsa-Szemerédi Theorem
- Sárközy Local Extrema Conjectures
- Schmidt's Problem
- Sendov Conjecture
- Sensitivity Conjecture
- Serre's Problem
- Shafarevich Conjecture
- Sierpiński's Conjecture
- Six Standard Deviations Suffice Theorem
- Smale's Problems
- Smarandache Function
- Smith Conjecture
- Snark
- Solved Problems
- Spectre Tile
- Square-Sum Problem
- Stanley-Wilf Conjecture
- Strong Perfect Graph Theorem
- Szemerédi-Trotter Theorem
- Taniyama-Shimura Conjecture
- Tarski's Circle-Squaring Problem
- Tau Conjecture
- Ten Martini Theorem
- Tetrahedron Line Picking
- Thurston's Geometrization Conjecture
- Truncated Octahedral Conjecture
- Tu-Deng Conjecture
- Uniform Turán Density
- Vampire Einstein Problem
- Vince Conjecture
- Ward's Conjecture
- Waring's Prime Number Conjecture
- Weak Goldbach Conjecture
- Weil Conjectures
- Weisstein's Conjecture
- Yff Conjecture
- Znám's Problem