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K-cell (mathematics) -- K-convex function -- K-distribution -- K-dron -- K-edge-connected graph -- K-equivalence -- K-finite -- K-frame -- K-function -- K-graph C*-algebra -- K-groups of a field -- K-homology -- K-mer -- K-noid -- K-Poincaré algebra -- K-Poincaré group -- K-regular sequence -- K-set (geometry) -- K shortest path routing -- K-space (functional analysis) -- K-stability -- K-stability of Fano varieties -- K-SVD -- K-synchronized sequence -- K-theory -- K-theory (physics) -- K-theory of a category -- K-theory spectrum -- K-topology -- K-transform -- K-tree -- K-trivial set -- K-vertex-connected graph --

K3 surface -- Kabsch algorithm -- Kac–Bernstein theorem -- Kac–Moody algebra -- Kac's lemma -- Kachurovskii's theorem -- Kaczmarz method -- Kadison–Kastler metric -- Kadison–Singer problem -- Kadison transitivity theorem -- Kadomtsev–Petviashvili equation -- Kahan summation algorithm -- Kähler differential -- Kähler–Einstein metric -- Kähler manifold -- Kähler quotient -- Kahn–Kalai conjecture -- Kahun Papyri -- Kaidā glyphs -- Kaiser–Meyer–Olkin test -- Kaiser window -- Kakeya conjecture -- Kakeya set -- Kaktovik numerals -- Kakuro -- Kakutani fixed-point theorem -- Kakutani's theorem -- Kakutani's theorem (geometry) -- Kakutani's theorem (measure theory) -- Kalai's 3^d conjecture -- Kaleidocycle -- Källén function -- Kallman–Rota inequality -- Kalman decomposition -- Kalman filter -- Kalman–Yakubovich–Popov lemma -- Kalman's conjecture -- Kalmanson combinatorial conditions --

Kampé de Fériet function -- Kampyle of Eudoxus -- Kan extension -- Kan fibration -- Kan-Thurston theorem -- Kanamori–McAloon theorem -- Kaniadakis distribution -- Kaniadakis Erlang distribution -- Kaniadakis exponential distribution -- Kaniadakis Gamma distribution -- Kaniadakis Gaussian distribution -- Kaniadakis logistic distribution -- Kaniadakis Weibull distribution -- Kansa method -- KANT (software) -- Kantor double -- Kantor–Koecher–Tits construction -- Kantorovich inequality -- Kantorovich theorem -- Kaplan-Meier estimator -- Kaplan–Yorke conjecture -- Kaplan–Yorke map -- Kaplansky density theorem -- Kaplansky's conjectures -- Kaplansky's theorem on projective modules -- Kaplansky's theorem on quadratic forms -- Kappa calculus -- Kappa curve -- Kappa Mu Epsilon -- Kappa statistic -- Kaprekar number -- Kaprekar's routine --

Karamata's inequality -- Karanapaddhati -- Karatsuba algorithm -- Kardar–Parisi–Zhang equation -- Karger's algorithm -- Karloff–Zwick algorithm -- Karlsruhe Accurate Arithmetic -- Karlsruhe metric -- Kármán–Howarth equation -- Karmarkar's algorithm -- Karnaugh map -- Karoubi conjecture -- Karoubi envelope -- Karp–Lipton theorem -- Karp's 21 NP-complete problems -- Karplus equation -- Karush–Kuhn–Tucker conditions -- Kasch ring -- Katapayadi system -- Katchalski-Katzir algorithm -- Katětov–Tong insertion theorem -- Katharine Coman -- Kato surface -- Kato's conjecture -- Katugampola fractional operators -- Katydid sequence -- Katz centrality -- Katz–Lang finiteness theorem -- Kauffman polynomial -- Kaufmann vortex -- Kaup–Kupershmidt equation -- Kautz graph --

Kavli Institute for the Physics and Mathematics of the Universe -- Kawamata–Viehweg vanishing theorem -- Kawasaki's Riemann–Roch formula -- Kawasaki's theorem -- Kayles -- Kazamaki's condition -- Kazhdan–Lusztig polynomial -- Kazhdan–Margulis theorem -- Kazhdan's property (T) -- Kazimierz Twardowski -- Kazushige Goto -- KBD algorithm -- KdV hierarchy -- Keel–Mori theorem -- Keisan Game -- Keith Medal -- Keith number -- Keldysh Institute of Applied Mathematics -- Keller's conjecture -- Kellogg's theorem -- Kelly criterion -- Kelly network -- Kelly's lemma -- Kelmans–Seymour conjecture -- Kelvin conjecture -- Kelvin functions -- Kelvin transform -- Kelvin's circulation theorem -- Kemeny's constant -- Kemnitz's conjecture -- Kempe chain -- Kempe's universality theorem -- Kempf–Ness theorem -- Kempf vanishing theorem -- Kempner function -- Kempner series --

Kendall rank correlation coefficient -- Kendall tau distance -- Kendall's notation -- Kendall's W -- KenKen -- Kenmotsu manifold -- Kenneth O. May Prize -- Kent distribution -- Kepler–Bouwkamp constant -- Kepler conjecture -- Kepler–Poinsot polyhedron -- Kepler triangle -- Kepler's laws of planetary motion -- Kerala Mathematical Association -- Kerala school of astronomy and mathematics -- Kerala School of Mathematics, Kozhikode -- Kernel (algebra) -- Kernel (category theory) -- Kernel (linear algebra) -- Kernel (set theory) -- Kernel (statistics) -- Kernel density estimation -- Kernel embedding of distributions -- Kernel Fisher discriminant analysis -- Kernel function for solving integral equation of surface radiation exchanges -- Kernel-independent component analysis -- Kernel methods for vector output -- Kernel operator -- Kernel principal component analysis -- Kernel regression -- Kernel smoother -- Kernel trick -- Kernelization -- Kernighan–Lin algorithm -- Kervaire invariant -- Kervaire manifold -- Kervaire semi-characteristic --

Key (cryptography) -- Key relevance -- Keynes–Ramsey rule -- KFUPM mathematics olympiad -- Khabibullin's conjecture on integral inequalities -- Kharitonov region -- Kharitonov's theorem -- Kharkov Mathematical Society -- Kharoṣṭhī numerals -- Khatri–Rao product -- Khinchin integral -- Khinchin's constant -- Khinchin's theorem -- Khinchin's theorem on the factorization of distributions -- Khintchine inequality -- Khmaladze transformation -- Khmer numerals -- KHOPCA clustering algorithm -- Khovanov homology -- Kicked rotator -- Kiepert conics -- Killed process -- Killing form -- Killing–Hopf theorem -- Killing horizon -- Killing spinor -- Killing tensor -- Killing vector field -- Kinematics -- Kinematics of the cuboctahedron -- Kinetic energy -- Kinetic logic -- Kinetic Monte Carlo -- Kinetic scheme -- Kinetic smallest enclosing disk -- King Wen sequence -- King's graph -- Kingman's subadditive ergodic theorem --

Kirby calculus -- Kirby–Siebenmann class -- Kirchhoff's theorem -- Kirillov character formula -- Kirillov model -- Kirkman's schoolgirl problem -- Kirkpatrick–Seidel algorithm -- Kirkwood approximation -- Kirszbraun theorem -- Kirwan map -- Kish grid -- Kisrhombille -- Kissing number -- Kitchen sink regression -- Kite (geometry) -- Kittell graph -- KK-theory -- Klee–Minty cube -- Klee's measure problem -- Kleene algebra -- Kleene–Brouwer order -- Kleene fixed-point theorem -- Kleene fixpoint theorem -- Kleene–Rosser paradox -- Kleene star -- Kleene's O -- Kleene's recursion theorem -- Kleene's T predicate -- Kleetope -- Kleiman's theorem -- Klein bottle -- Klein configuration -- Klein cubic -- Klein cubic threefold -- Klein four-group -- Klein geometry -- Klein–Gordon equation -- Klein graphs -- Klein–Kramers equation -- Klein polyhedron -- Klein quadric -- Klein quartic -- Klein surface -- Klein's encyclopedia -- Kleinian group -- Kleinian integer -- Kleinian model -- Kleisli category -- Kleitman–Wang algorithms -- Kleroterion --

Kline sphere characterization -- Klingen Eisenstein series -- Kloosterman sum -- Knapsack problem -- Knaster–Kuratowski fan -- Knaster–Kuratowski–Mazurkiewicz lemma -- Knaster–Tarski theorem -- Knaster's condition -- Knee of a curve -- Kneser graph -- Kneser–Ney smoothing -- Kneser–Tits conjecture -- Kneser's theorem -- Kneser's theorem (combinatorics) -- Kneser's theorem (differential equations) -- Knight's graph -- Knight's tour -- Knightian uncertainty -- Knights of the Lambda Calculus -- Knizhnik–Zamolodchikov equations -- Knockoffs (statistics) -- Knödel number -- Knot (mathematics) -- Knot complement -- Knot energy -- Knot group -- Knot invariant -- Knot polynomial -- Knot tabulation -- Knot theory -- Knot thickness -- Knots in Washington -- Knots Unravelled -- Knower paradox -- Knowledge arena -- Knowledge crystal -- Knowledge graph embedding --

Knudsen paradox -- Knuth–Bendix completion algorithm -- Knuth's Simpath algorithm -- Knuth's up-arrow notation -- Kobayashi–Hitchin correspondence -- Kobayashi metric -- Kobon triangle problem -- Koch snowflake -- Kochanek–Bartels spline -- Kochanski multiplication -- Kochen–Specker theorem -- Kodaira dimension -- Kodaira embedding theorem -- Kodaira–Spencer map -- Kodaira surface -- Kodaira vanishing theorem -- Kodaira's classification -- Koebe quarter theorem -- Koecher–Maass series -- Koecher–Vinberg theorem -- Koenigs function -- Kolakoski sequence -- Kolmogorov–Arnold–Moser theorem -- Kolmogorov–Arnold representation theorem -- Kolmogorov automorphism -- Kolmogorov backward equation -- Kolmogorov backward equations (diffusion) -- Kolmogorov complexity -- Kolmogorov continuity theorem -- Kolmogorov equations -- Kolmogorov equations (Markov jump process) -- Kolmogorov extension theorem -- Kolmogorov integral -- Kolmogorov Medal -- Kolmogorov randomness -- Kolmogorov–Smirnov test -- Kolmogorov space -- Kolmogorov structure function -- Kolmogorov's criterion -- Kolmogorov's generalized criterion -- Kolmogorov's inequality -- Kolmogorov's normability criterion -- Kolmogorov's three-series theorem -- Kolmogorov's two-series theorem -- Kolmogorov's zero–one law --

Komar superpotential -- Komlós–Major–Tusnády approximation -- Komornik–Loreti constant -- Kōmura's theorem -- Konhauser polynomials -- Kőnig's lemma -- Kőnig's theorem (graph theory) -- König's theorem (set theory) -- Kontorovich–Lebedev transform -- Kontsevich invariant -- Koopman–von Neumann classical mechanics -- Koornwinder polynomials -- Koras–Russell cubic threefold -- Korea Institute for Advanced Study -- Korean Mathematical Olympiad -- Korean numerals -- Korkine–Zolotarev lattice basis reduction algorithm -- Korn's inequality -- Korovkin approximation -- Korteweg–De Vries equation -- Korteweg-de Vries Institute for Mathematics -- Kos (unit) -- Kosambi–Karhunen–Loève theorem -- Kosaraju's algorithm -- Kosmann lift -- Kosnita's theorem -- Kostant partition function -- Kostant polynomial -- Kostant's convexity theorem -- Kostka number -- Kostka polynomial -- Koszul algebra -- Koszul cohomology -- Koszul complex -- Koszul duality -- Koszul–Tate resolution --

Köthe conjecture -- Kovalevskaya Prize -- Kovner–Besicovitch measure -- Kozeny–Carman equation -- Középiskolai Matematikai és Fizikai Lapok -- KPSS test -- KR-theory -- Krackhardt kite graph -- Kraft–McMillan inequality -- Kraków School of Mathematics -- Kraków School of Mathematics and Astrology -- Kramer graph -- Kramers–Kronig relations -- Kramers-Wannier duality -- Krasner's lemma -- Kravchuk polynomials -- Krawtchouk matrices -- Krein–Milman theorem -- Krein–Rutman theorem -- Krein–Smulian theorem -- Krein's condition -- Krener's theorem -- Kretschmann scalar -- Krichevsky–Trofimov estimator -- Krieger–Nelson Prize -- Kriging -- Kripke–Platek set theory -- Kripke–Platek set theory with urelements -- Kripke semantics -- Kristo Ivanov -- Krivine machine -- Krivine–Stengle Positivstellensatz -- Kriyakramakari --

Krohn–Rhodes theory -- Kronecker coefficient -- Kronecker delta -- Kronecker graph -- Kronecker limit formula -- Kronecker product -- Kronecker substitution -- Kronecker sum of discrete Laplacians -- Kronecker symbol -- Kronecker–Weber theorem -- Kronecker's congruence -- Kronecker's lemma -- Kronecker's theorem -- Kronheimer–Mrowka basic class -- Krull dimension -- Krull ring -- Krull–Schmidt category -- Krull–Schmidt theorem -- Krull's principal ideal theorem -- Krull's separation lemma -- Krull's theorem -- Kruskal–Katona theorem -- Kruskal–Szekeres coordinates -- Kruskal–Wallis one-way analysis of variance -- Kruskal's algorithm -- Kruskal's tree theorem -- Krylov–Bogoliubov averaging method -- Krylov–Bogolyubov theorem -- Krylov subspace -- Krypto (game) --

Kubilius model -- Kubo formula -- Kuder–Richardson formulas -- Kuga fiber variety -- Kuhn's theorem -- Kuiper's test -- Kuiper's theorem -- Kulisch arithmetic -- Kulkarni–Nomizu product -- Kullback–Leibler divergence -- Kullback's inequality -- Kumaraswamy distribution -- Kummer configuration -- Kummer sum -- Kummer surface -- Kummer theory -- Kummer–Vandiver conjecture -- Kummer variety -- Kummer's congruence -- Kummer's conjecture -- Kummer's function -- Kummer's theorem -- Kummer's transformation of series -- Kundt spacetime -- Kundu equation -- Kunen's inconsistency theorem -- Kunita–Watanabe inequality -- Künneth theorem -- Kunstweg -- Kuramoto model -- Kuramoto–Sivashinsky equation -- Kuranishi structure -- Kuratowski and Ryll-Nardzewski measurable selection theorem -- Kuratowski closure axioms -- Kuratowski convergence -- Kuratowski embedding -- Kuratowski–Ulam theorem -- Kuratowski's closure-complement problem -- Kuratowski's free set theorem -- Kuratowski's intersection theorem -- Kurepa tree -- Kurosh problem -- Kurosh subgroup theorem -- Kurt Gödel Society -- Kurtosis -- Kurtosis risk --

Kushner equation -- Kuṭṭaka -- Kuṭṭākāra Śirōmaṇi -- Kuznetsov trace formula -- Ky Fan inequality -- Ky Fan lemma -- Kymograph -- Kyoto Prize in Basic Sciences --