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Jack Polynomial
Jackson's Difference Fan
Jackson's Identity
Jackson singular integral
Jaco-Shalen-Johannson Torus Decomposition
Jacobi brackets
Jacobi condition
Jacobian conjecture
Jacobian matrix and determinant
Jacobson Canonical Form
Jacobson category
Jacobson ring
Jaeger composition product
Janet theorem
Janson inequality
Japanese theorem for cyclic polygons
Japanese Triangulation Theorem
Jerabek's Hyperbola
Jessen's Orthogonal Icosahedron
Jinc Function
Joachimsthal's Equation
John–Nirenberg inequalities
Johnson Circle
Joint probability distribution
Jonah Formula
Jordan–Dedekind space
Jordan–Hölder theorem
Jourdain principle
Journal of Algebraic Combinatorics
Journal of Combinatorial Theory
Journal of Commutative Algebra
Journal of Industrial and Management Optimization
Journal of Mathematical Physics
Journal of the American Mathematical Society
Journal de Mathématiques Pures et Appliquées
Journal of Recreational Mathematics
Journal of Symbolic Computation
Joyce Sequence
Julia–Wolff–Carathéodory theorem
Jump function
Jump process
Jung theorem