001 Milne’s rationality conjecture Algebra, algebraic geometry, group theory, or logic is central 002 The full Birch–Swinnerton-Dyer formula in Selmer coranks zero and one Algebra, algebraic geometry, group theory, or logic is central 004 Hilbert’s tenth problem over Q Algebra, algebraic geometry, group theory, or logic is central 006 Goldfeld’s conjecture Algebra, algebraic geometry, group theory, or logic is central 008 The Deligne–Drinfeld conjecture Algebra, algebraic geometry, group theory, or logic is central 009 Bogomolov–Pop and Milnor K -theoretic reconstruction Algebra, algebraic geometry, group theory, or logic is central 010 Fontaine–Mazur modularity at the prime 2 and 2 -adic pro-modularity Algebra, algebraic geometry, group theory, or logic is central 014 Restricted geometric Langlands, generic Ramanujan and Arthur parameters Algebra, algebraic geometry, group theory, or logic is central 016 Zilber–Pink in abelian varieties and the Siegel threefold Algebra, algebraic geometry, group theory, or logic is central 018 The Margulis–Platonov conjecture over global fields Algebra, algebraic geometry, group theory, or logic is central 019 The p -adic section conjecture Algebra, algebraic geometry, group theory, or logic is central 027 Integral density on curve character varieties Algebra, algebraic geometry, group theory, or logic is central 030 Modularity over imaginary quadratic fields Algebra, algebraic geometry, group theory, or logic is central 031 Uchida’s conjecture for open Galois homomorphisms Algebra, algebraic geometry, group theory, or logic is central 032 The rational Hodge conjecture for CM abelian varieties and products of K3 surfaces Algebraic and complex geometry 033 Campana’s orbifold Iitaka conjecture and logarithmic subadditivity Algebraic and complex geometry 034 Log abundance and effective Iitaka fibrations Algebraic and complex geometry 035 Threefold log abundance in numerical dimension one in characteristic p > 3 Algebraic and complex geometry 036 Numerical semiampleness and generalized minimal models Algebraic and complex geometry 037 The sharp ordinary-double-point volume gap Algebraic and complex geometry 038 Fujita’s freeness conjecture Algebraic and complex geometry 039 Nagata’s conjecture and maximal Seshadri constants Algebraic and complex geometry 040 Bloch’s conjecture for complex surfaces Algebraic and complex geometry 041 Hyperkähler SYZ and projective-space bases Algebraic and complex geometry 042 Oka classification for K3 surfaces and other compact complex surfaces Algebraic and complex geometry 043 P = W for fixed-determinant moduli spacesAlgebraic and complex geometry 044 The equivariant cohomological Hikita conjecture for quivers Algebraic and complex geometry 046 Counterexamples to Shafarevich holomorphic convexity Algebraic and complex geometry 047 Complex counterexamples to cancellation and affine fibrations Algebraic and complex geometry 048 A characteristic-zero counterexample to Lipman–Zariski Algebraic and complex geometry 049 A stable-coordinate counterexample in four variables Algebraic and complex geometry 050 A counterexample to Griffiths’ positivity conjecture Algebraic and complex geometry 051 Kobayashi’s canonical-ampleness conjecture Algebraic and complex geometry 052 Tangent-bundle splittings and universal covers Algebraic and complex geometry 053 A counterexample to Pixton’s original completeness conjecture Algebraic and complex geometry 054 Counterexamples to Kuznetsov’s rationality conjecture Algebraic and complex geometry 055 Toda’s Gepner conjecture and large-volume stability Algebraic and complex geometry 056 Termination of fourfold minimal model programs Algebraic and complex geometry 057 Campana’s abelianity conjecture and special varieties Algebraic and complex geometry 058 The Kollár–Pardon universal-cover conjecture Algebraic and complex geometry 059 Counterexamples to Zariski’s multiplicity conjecture Algebraic and complex geometry 060 The Global Spherical Shell conjecture Algebraic and complex geometry 062 The LeBrun–Salamon conjecture and projective contact classification Algebraic and complex geometry 063 The generalized Mukai conjecture Algebraic and complex geometry 064 The μ -constant problem for surface singularities Algebraic and complex geometry 065 Virasoro constraints for complete intersections and projective bundles Algebraic and complex geometry 066 Bounded klt complements for Fano contractions Algebraic and complex geometry 067 The Campana–Peternell conjecture in dimension six Algebraic and complex geometry 068 Anticanonical nonvanishing under smooth semipositivity Algebraic and complex geometry 069 Quantum geometric Langlands at irrational level Algebraic and complex geometry 116 Uniform identity testing for noncommutative formulas Algebra, algebraic geometry, group theory, or logic is central 141 The existential theory of the reals and existential–universal sentences in the counting hierarchy Algebra, algebraic geometry, group theory, or logic is central 142 Deterministic polynomial factorization over prime fields Algebra, algebraic geometry, group theory, or logic is central 168 Combinatorial invariance of Kazhdan–Lusztig polynomials Algebra, algebraic geometry, group theory, or logic is central 169 The Shareshian–Wachs e -positivity conjecture Algebra, algebraic geometry, group theory, or logic is central 193 Serre’s intersection-multiplicity conjecture Algebra 194 Lech’s multiplicity conjecture Algebra 195 A counterexample to the small Cohen–Macaulay module conjecture Algebra 196 A counterexample to Kaplansky’s zero-divisor conjecture Algebra 197 Nonsofic groups and group-ring counterexamples Algebra 198 A counterexample to the little finitistic-dimension conjecture Algebra 199 Counterexamples to conjectures of Auslander–Reiten, Tachikawa, and Nakayama Algebra 200 Eisenbud–Green–Harris and lex-plus-powers in characteristic zero Algebra 201 A counterexample to Kurosh’s division-ring problem Algebra 202 The blockwise Alperin weight conjecture Algebra 203 Donovan’s conjecture over fields and discrete valuation rings Algebra 204 Tensor saturation for even spin groups Algebra 205 Saxl’s conjecture and universal tensor squares Algebra 206 Finite lattice representation: counterexamples and undecidability Algebra 207 The ℓ 1 -Bass and complex Bass trace conjectures Algebra 208 The finite Benson–Etingof–Ostrik conjecture Algebra 209 Integral counterexamples to Gersten’s conjecture Algebra 210 Foulkes’ conjecture for sixth powers and quadratic stabilization Algebra 240 Shelah’s eventual categoricity conjecture Mathematical logic 241 Rigidity of the Turing degrees Mathematical logic 242 Single-fold Diophantine representations Mathematical logic 243 Choiceless counting does not capture polynomial time Mathematical logic 244 The partition principle does not imply choice Mathematical logic 245 The β -Barendregt–Geuvers–Klop conjecture Mathematical logic 246 Cannon’s conjecture Group theory 247 An infinite finitely presented residually finite 2 -group Group theory 248 Thompson’s group F is nonamenable Group theory 249 A finitely generated counterexample to Eilenberg–Ganea Group theory 250 The Boone–Higman conjecture and higher finiteness Group theory 251 Amenability, unitarizability, and Ulam stability Group theory 252 A non-residually-finite torsion-free hyperbolic group Group theory 253 An infinite finitely presented simple amenable group Group theory 254 Classifying spaces and geometric obstructions for Artin groups Group theory 255 Quasi-isometric rigidity of virtually polycyclic groups Group theory 256 Howie’s conjecture on equations over groups Group theory 257 A hyperbolic group with no geometric CAT(0) action Group theory 258 Gersten’s conjecture for one-relator groups Group theory 259 A group without fixed price Group theory 280 Strong locality for strongly rational unitary vertex operator algebras Algebra, algebraic geometry, group theory, or logic is central 323 Relative independence of the separable quotient problem Algebra, algebraic geometry, group theory, or logic is central