projection lemma
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Céa's lemma — is a lemma in mathematics. It is an important tool for proving error estimates for the finite element method applied to elliptic partial differential equations. Contents 1 Lemma statement 2 Error estimate in the energy norm 3 … Wikipedia
Johnson–Lindenstrauss lemma — In mathematics, the Johnson–Lindenstrauss lemma is a result concerning low distortion embeddings of points from high dimensional into low dimensional Euclidean space. The lemma states that a small set of points in a high dimensional space can be… … Wikipedia
Splitting lemma — In mathematics, and more specifically in homological algebra, the splitting lemma states that in any abelian category, the following statements for short exact sequence are equivalent. Given a short exact sequence with maps q and r: :0 ightarrow… … Wikipedia
Tube lemma — In mathematics, particularly topology, the tube lemma is a useful tool in order to prove that the finite product of compact spaces is compact. It is in general, a concept of point set topology. Tube lemmaBefore giving the lemma, we note the… … Wikipedia
Noether normalization lemma — In mathematics, the Noether normalization lemma is a result of commutative algebra, introduced in (Noether 1926). A simple version states that for any field k, and any finitely generated commutative k algebra A, there exists a nonnegative integer … Wikipedia
Lebesgue's lemma — For Lebesgue s lemma for open covers of compact spaces in topology see Lebesgue s number lemma In mathematics, Lebesgue s lemma is an important statement in approximation theory. It provides a bound for the projection error.tatementLet ( V , ||… … Wikipedia
Schanuel's lemma — In mathematics, especially in the area of algebra known as module theory, Schanuel s lemma allows one to compare how far modules depart from being projective. It is useful in defining the Heller operator in the stable category, and in giving… … Wikipedia
Perron–Frobenius theorem — In linear algebra, the Perron–Frobenius theorem, proved by Oskar Perron (1907) and Georg Frobenius (1912), asserts that a real square matrix with positive entries has a unique largest real eigenvalue and that the corresponding… … Wikipedia
List of mathematics articles (P) — NOTOC P P = NP problem P adic analysis P adic number P adic order P compact group P group P² irreducible P Laplacian P matrix P rep P value P vector P y method Pacific Journal of Mathematics Package merge algorithm Packed storage matrix Packing… … Wikipedia
Differential geometry of surfaces — Carl Friedrich Gauss in 1828 In mathematics, the differential geometry of surfaces deals with smooth surfaces with various additional structures, most often, a Riemannian metric. Surfaces have been extensively studied from various perspectives:… … Wikipedia
List of mathematics articles (G) — NOTOC G G₂ G delta space G networks Gδ set G structure G test G127 G2 manifold G2 structure Gabor atom Gabor filter Gabor transform Gabor Wigner transform Gabow s algorithm Gabriel graph Gabriel s Horn Gain graph Gain group Galerkin method… … Wikipedia
