Categories
Browse problems by mathematical discipline, following the Mathematics Subject Classification (MSC 2020).
Mathematical Statistics
MSC 62Statistical estimation, hypothesis testing, asymptotic theory, nonparametric statistics, high-dimensional inference.
71 problemsInformation Theory
MSC 94AShannon theory, coding theory, entropy, mutual information, channel capacity.
38 problemsProbability Theory
MSC 60Probability theory, stochastic processes, random matrices, concentration inequalities, large deviations.
30 problemsLearning Theory
MSC 68Q32Computational learning theory, statistical learning, PAC learning, online learning, information-theoretic limits.
29 problemsOptimization & Variational Methods
MSC 49-90Convex and non-convex optimization, combinatorial optimization, variational analysis, optimal control.
23 problemsCombinatorics & Graph Theory
MSC 05Enumerative, algebraic, extremal, and probabilistic combinatorics; graph theory.
9 problemsTheoretical Computer Science
MSC 68Computational complexity, algorithms, cryptography, quantum computing, formal languages.
4 problemsAnalysis & PDEs
MSC 26-46Real and complex analysis, functional analysis, harmonic analysis, partial differential equations.
1 problemMathematical Physics
MSC 81-83Quantum field theory, statistical mechanics, general relativity, string theory (mathematical aspects).
1 problemNumber Theory
MSC 11Analytic and algebraic number theory, prime distribution, Diophantine equations, arithmetic geometry.
No problems yetAlgebra
MSC 13-20Group theory, ring theory, field theory, homological algebra, representation theory.
No problems yetGeometry & Topology
MSC 14-57Differential geometry, algebraic geometry, algebraic topology, manifold theory.
No problems yetDynamical Systems & Ergodic Theory
MSC 37Continuous and discrete dynamical systems, chaos, ergodic theory, bifurcation.
No problems yetNumerical Analysis & Scientific Computing
MSC 65Approximation theory, numerical linear algebra, numerical PDEs, computational complexity of continuous problems.
No problems yetLogic & Foundations
MSC 03Mathematical logic, set theory, model theory, computability theory, proof theory.
No problems yet