M
- M. Riesz extension theorem (functional analysis)
- MacMahon Master theorem (enumerative combinatorics)
- Mahler's compactness theorem (geometry of numbers)
- Mahler's theorem (p-adic analysis)
- Maier's theorem (analytic number theory)
- Malgrange preparation theorem (singularity theory)
- Malgrange–Ehrenpreis theorem (differential equations)
- Manin–Drinfeld theorem (number theory)
- Mann's theorem (number theory)
- Marcinkiewicz theorem (functional analysis)
- Marden's theorem (polynomials)
- Mazur's control theorem (number theory)
- Mergelyan's theorem (complex analysis)
- Marginal value theorem (biology)
- Markus−Yamabe theorem (2D stability theory)
- Marriage theorem (combinatorics)
- Martingale representation theorem (probability theory)
- Mason–Stothers theorem (polynomials)
- Master theorem (recurrence relations, asymptotic analysis)
- Maschke's theorem (group representations)
- Matiyasevich's theorem (mathematical logic)
- Max flow min cut theorem (graph theory)
- Max Noether's theorem (algebraic geometry)
- Maximal ergodic theorem (ergodic theory)
- Maximum power theorem (electrical circuits)
- Maxwell's theorem (probability theory)
- May's theorem (game theory)
- Mazur–Ulam theorem (normed spaces)
- Mazur's torsion theorem (algebraic geometry)
- Mean value theorem (calculus)
- Measurable Riemann mapping theorem (conformal mapping)
- Mellin inversion theorem (complex analysis)
- Menelaus' theorem (geometry)
- Menger's theorem (graph theory)
- Mercer's theorem (functional analysis)
- Mermin–Wagner theorem (physics)
- Mertens' theorems (number theory)
- Metrization theorems (topological spaces)
- Meusnier's theorem (differential geometry)
- Midy's theorem (number theory)
- Mihăilescu's theorem (number theory)
- Milliken–Taylor theorem (Ramsey theory)
- Milliken's tree theorem (Ramsey theory)
- Milman–Pettis theorem (Banach space)
- Min-max theorem (functional analysis)
- Minimax theorem (game theory)
- Minkowski's theorem (geometry of numbers)
- Minkowski's second theorem (geometry of numbers)
- Minkowski–Hlawka theorem (geometry of numbers)
- Minlos' theorem (functional analysis)
- Miquel's theorem (circles)
- Mirsky–Newman theorem (group theory)
- Mitchell's embedding theorem (category theory)
- Mittag-Leffler's theorem (complex analysis)
- Modigliani–Miller theorem (finance theory)
- Modularity theorem (number theory)
- Mohr–Mascheroni theorem (geometry)
- Monge's theorem (geometry)
- Monodromy theorem (complex analysis)
- Monotone class theorem (measure theory)
- Monotone convergence theorem (mathematical analysis)
- Montel's theorem (complex analysis)
- Moore–Aronszajn theorem (Hilbert space)
- Mordell–Weil theorem (number theory)
- Moreau's theorem (convex analysis)
- Morera's theorem (complex analysis)
- Morley's categoricity theorem (model theory)
- Morley's trisector theorem (geometry)
- Morton's theorem (game theory)
- Mostow rigidity theorem (differential geometry)
- Mountain pass theorem (calculus of variations)
- Moving equilibrium theorem (economics)
- Multinomial theorem (algebra, combinatorics)
- Multiplication theorem (special functions)
- Multiplicity-one theorem (group representations)
- Mumford vanishing theorem (algebraic geometry)
- Müntz–Szász theorem (functional analysis)
- Mycielski's theorem (graph theory)
- Myers theorem (differential geometry)
- Myhill–Nerode theorem (formal languages)
Read more about this topic: List Of Theorems