signature — 1530s, a kind of document in Scottish law, from M.Fr. signature (16c.), from M.L. signatura sign, in classical L. the matrix of a seal, from signatus, pp. of signare to mark, sign (see SIGN (Cf. sign)). Meaning one s own name written in one s own … Etymology dictionary
Signature of a knot — The signature of a knot is a topological invariant in knot theory. It may be computed from the Seifert surface.Given a knot K in the 3 sphere, it has a Seifert surface S whose boundary is K . The Seifert form of S is the pairing phi : H 1(S) imes … Wikipedia
Matrix numbers — For the falling numbers effect in The Matrix films, see Matrix digital rain. Matrix numbers. Matrix numbers are alphanumeric codes (and on occasion, other symbols) stamped or hand written (or a combination of the two) into the run out groove area … Wikipedia
Signature (mathematics) — In mathematics, signature can refer to*The signature of a permutation is ±1 according to whether it is an even/odd permutation. The signature function defines a group homomorphism from the symmetric group to the group {±1}. *The signature of a… … Wikipedia
Involutory matrix — In mathematics, an involutory matrix is a matrix that is its own inverse. That is, matrix A is an involution iff A2 = I.One of the three classes of elementary matrix is involutory, namely the row interchange elementary matrix . A special case of… … Wikipedia
Metric signature — The signature of a metric tensor (or more generally a nondegenerate symmetric bilinear form, thought of as quadratic form) is the number of positive and negative eigenvalues of the metric. That is, the corresponding real symmetric matrix is… … Wikipedia
Digital Signature Algorithm — Le Digital Signature Algorithm, plus connu sous le sigle DSA, est un algorithme de signature numérique standardisé par le NIST aux États Unis, du temps où le RSA était encore breveté. Cet algorithme fait partie de la spécification DSS pour… … Wikipédia en Français
Nilpotent matrix — In linear algebra, a nilpotent matrix is a square matrix N such that for some positive integer k. The smallest such k is sometimes called the degree of N. More generally, a nilpotent transformation is a linear transformation L of a vector space… … Wikipedia
ElGamal signature scheme — The ElGamal signature scheme is a digital signature scheme which is based on the difficulty of computing discrete logarithms. It was described by Taher ElGamal in 1984 (see T. ElGamal, A public key cryptosystem and a signature scheme based on… … Wikipedia
The Matrix — For the series, see The Matrix (franchise). For other uses, see Matrix. The Matrix Theatrical release poster Directed by Andy Wachowski Larry Wachowski … Wikipedia
