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Area Any area Mathematics (936) Computer science (28) Physics & astronomy (22) Chemistry & materials (13) Life sciences (6) Earth & society (6)
Field All of mathematics Algebra (45) Analysis (69) Combinatorics (158) Geometry (72) Graph theory (71) Logic & formalisation (10) Number theory (500) Probability (11)
Problem Any problem in combinatorics 4-slope Kakeya-type sum-difference constant A Sidon set constant Asymptotic counting exponent for partial Hadamard matrices Babai–Seress Conjectures on the Diameter of Finite Groups Barker sequences Beaver Math Olympiad (BMO) Beck–Fiala theorem and conjecture Ben Green's Open Problem 1 Ben Green's Open Problem 16 Ben Green's Open Problem 18 Ben Green's Open Problem 21 Ben Green's Open Problem 31 Ben Green's Open Problem 33 Ben Green's Open Problem 37 Ben Green's Open Problem 40 Ben Green's Open Problem 5 Ben Green's Open Problem 50 Ben Green's Open Problem 58 Ben Green's Open Problem 72 Ben Green's Open Problem 77 Chvátal's Conjecture Conjectures about Latin Squares Costas arrays of order 32 and 33 Davenport constant for C_n^3 Dedekind Numbers Difference Bases Digit 2 in base 3 representation of 2^n Erdős minimum overlap problem Erdős Problem #10 Erdős Problem #1020 Erdős Problem #1093 Erdős Problem #1109 Erdős Problem #1110 Erdős Problem #1145 Erdős Problem #1159 Erdős Problem #1167 Erdős Problem #1192 Erdős Problem #1199 Erdős Problem #120 Erdős Problem #1206 Erdős Problem #141 Erdős Problem #153 Erdős Problem #155 Erdős Problem #156 Erdős Problem #158 Erdős Problem #160 Erdős Problem #170 Erdős Problem #172 Erdős Problem #181 Erdős Problem #188 Erdős Problem #195 Erdős Problem #196 Erdős Problem #197 Erdős Problem #200 Erdős Problem #203 Erdős Problem #236 Erdős Problem #241 Erdős Problem #272 Erdős Problem #273 Erdős Problem #282 Erdős Problem #295 Erdős Problem #312 Erdős Problem #319 Erdős Problem #326 Erdős Problem #329 Erdős Problem #340 Erdős Problem #342 Erdős Problem #423 Erdős Problem #44 Erdős Problem #488 Erdős Problem #501 Erdős Problem #535 Erdős Problem #539 Erdős Problem #562 Erdős Problem #563 Erdős Problem #564 Erdős Problem #567 Erdős Problem #593 Erdős Problem #600 Erdős Problem #609 Erdős Problem #617 Erdős Problem #624 Erdős Problem #653 Erdős Problem #701 Erdős Problem #723 Erdős Problem #757 Erdős Problem #774 Erdős Problem #789 Erdős Problem #80 Erdős Problem #812 Erdős Problem #817 Erdős Problem #82 Erdős Problem #835 Erdős Problem #85 Erdős Problem #857 Erdős Problem #872 Erdős Problem #881 Erdős Problem #893 Erdős Problem #9 Erdős Problem #949 Erdős–Szemerédi 3-sunflower-free capacity Exponential growth constant for diagonal Ramsey numbers Frankl's union-closed sets conjecture Furstenberg–Sárközy exponent for square-difference-free sets Golay's Merit Factor Good asymptotic constructions of Szemerédi–Trotter Green's Open Problem 12 Green's Open Problem 15 Green's Open Problem 22 Green's Open Problem 24 Green's Open Problem 25 Green's Open Problem 27 Green's Open Problem 32 Green's Open Problem 36 Green's Open Problem 38 Green's Open Problem 39 Green's Open Problem 51 Green's Open Problem 52 Green's Open Problem 53 Green's Open Problem 9 Hadamard matrices of open orders Kakeya and Nikodym sets in finite fields Kakeya-type sum-difference constant Komlós discrepancy constant Large cap sets in F_3^n ↳ Cap sets in dimension 7 ↳ Cap sets in dimension 8 Main conjecture on fusible numbers Marton's conjecture (Polynomial Freiman-Ruzsa) constant Monochromatic quantum graphs (inherited vertex colorings) Number of different products of subsets of 1, 2, …, n Optimal Golomb rulers Ramsey numbers Rate at which κ(n) approaches 1 Sidon set density inside (4,5) sets Single-set sum-difference exponent Small van der Waerden numbers Smaller covering designs Snake-in-the-box — longest induced paths in hypercubes Sparse Ruler Stanley–Wilf limit for the permutation pattern 1324 Steiner Systems Subsets of the grid with no isosceles triangles Sum-product exponent for the reals Sum-product problems The 1/3–2/3 conjecture for balanced pairs in posets The Arithmetic Kakeya Conjecture The chromatic number of the plane (Hadwiger–Nelson problem) The Erdős–Rado sunflower conjecture The Erdős–Szekeres happy ending problem The Gyarmati-Hennecart-Ruzsa sum-difference constant The hypergraph Turán number of the tetrahedron The length of an s-increasing sequence of r-tuples The lonely runner conjecture The sixth Schur number S(6) Unnormalized single-set sum-difference exponent VCₙ dimension of convex sets in ℝⁿ, ℝⁿ⁺¹, ℝⁿ⁺² Written on the Wall II - Conjecture 40
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