K
- Kachurovskii's theorem (convex analysis)
- Kanamori–McAloon theorem (mathematical logic)
- Kantorovich theorem (functional analysis)
- Kaplansky density theorem (von Neumann algebra)
- Kaplansky's theorem on quadratic forms (quadratic forms)
- Karhunen–Loève theorem (stochastic processes)
- Karp–Lipton theorem (computational complexity theory)
- Katz–Lang finiteness theorem (number theory)
- Kawamata–Viehweg vanishing theorem (algebraic geometry)
- Kawasaki's theorem (paper folding)
- Kelvin's circulation theorem (physics)
- Kempf–Ness theorem (algebraic geometry)
- Kharitonov's theorem (control theory)
- Khinchin's theorem (probability)
- Killing–Hopf theorem (Riemannian geometry)
- Kirby–Paris theorem (proof theory)
- Kirchhoff's theorem (graph theory)
- Kirszbraun theorem (Lipschitz continuity)
- Kleene's recursion theorem (recursion theory)
- Kleene fixed-point theorem (order theory)
- Knaster–Tarski theorem (order theory)
- Kneser's theorem (combinatorics)
- Kneser's theorem (differential equations)
- Kochen–Specker theorem (physics)
- Kodaira embedding theorem (algebraic geometry)
- Kodaira vanishing theorem (complex manifold)
- Koebe 1/4 theorem (complex analysis)
- Kolmogorov–Arnold–Moser theorem (dynamical systems)
- Kolmogorov extension theorem (stochastic processes)
- Kolmogorov's three-series theorem (mathematical series)
- Kōmura's theorem (measure theory)
- König's theorem (mathematical logic)
- König's theorem (graph theory) (bipartite graphs)
- König's theorem (kinetics) (physics)
- König's theorem (set theory) (cardinal numbers)
- Kövari–Sós–Turán theorem (graph theory)
- Kraft–McMillan theorem (coding theory)
- Kramers theorem (physics)
- Krein–Milman theorem (mathematical analysis, discrete geometry)
- Krener's theorem (control theory)
- Kronecker's theorem (diophantine approximation)
- Kronecker–Weber theorem (number theory)
- Krull's principal ideal theorem (commutative algebra)
- Krull–Schmidt theorem (group theory)
- Kruskal–Katona theorem (combinatorics)
- Kruskal's tree theorem (order theory)
- Krylov–Bogolyubov theorem (dynamical systems)
- Kuiper's theorem (operator theory, topology)
- Künneth theorem (algebraic topology)
- Kurosh subgroup theorem (group theory)
- Kutta–Joukowski theorem (physics)
Read more about this topic: List Of Theorems