This following is a list of lemmas (or, "lemmata", i.e. minor theorems, or sometimes intermediate technical results factored out of proofs). See also list of axioms, list of theorems and list of conjectures.
A commutative diagram that illustrates the five lemma
Ring theory and commutative algebra
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Differential equations
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Functional analysis
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Mathematical series
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Applied mathematics
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diagram of a length-8 fast Fourier transform
Computational complexity theory
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Hyperbolic geometry
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Riemannian geometry
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Analytic number theory
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Diophantine equations
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Differential topology
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An example of a covering described by the Knaster–Kuratowski–Mazurkiewicz lemma
Topological groups and semigroups
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