sum of matrices
1Direct sum — The symbol denotes direct sum; it is also the astrological and astronomical symbol for Earth, and a symbol for the Exclusive disjunction. In mathematics, one can often define a direct sum of objects already known, giving a new one. This is… …
2Pauli matrices — The Pauli matrices are a set of 2 times; 2 complex Hermitian and unitary matrices. Usually indicated by the Greek letter sigma (σ), they are occasionally denoted with a tau (τ) when used in connection with isospin symmetries. They are::sigma 1 =… …
3Gell-Mann matrices — The Gell Mann matrices, named for Murray Gell Mann, are one possible representation of the infinitesimal generators of the special unitary group called SU(3).This group has eight generators, which we can write as gi , with i taking values from 1… …
42 × 2 real matrices — The set of 2 × 2 real matrices is denoted by M(2, R). Two matrices p and q in M(2, R) have a sum p + q given by matrix addition. The product matrix p q is formed from the dot product of the rows and columns of its factors… …
5Clique-sum — A clique sum of two planar graphs and the Wagner graph, forming a K5 free graph. In graph theory, a branch of mathematics, a clique sum is a way of combining two graphs by gluing them together at a clique, analogous to the connected sum operation …
6List of matrices — This page lists some important classes of matrices used in mathematics, science and engineering: Matrices in mathematics*(0,1) matrix a matrix with all elements either 0 or 1. Also called a binary matrix . *Adjugate matrix * Alternant matrix a… …
7Generalizations of Pauli matrices — In mathematics and physics, in particular quantum information, the term generalized Pauli matrices refers to families of matrices which generalize the (linear algebraic) properties of the Pauli matrices. In this article we give a few classes of… …
8Distance matrices in phylogeny — Distance matrices are used in phylogeny as non parametric distance methods were originally applied to phenetic data using a matrix of pairwise distances. These distances are then reconciled to produce a tree (a phylogram, with informative branch… …
9Direct sum of modules — For the broader use of the term in mathematics, see Direct sum. In abstract algebra, the direct sum is a construction which combines several modules into a new, larger module. The result of the direct summation of modules is the smallest general… …
10Real matrices (2 x 2) — The 2 x 2 real matrices are the linear mappings of the Cartesian coordinate system into itself by the rule:(x,y) mapsto (x,y)egin{pmatrix}a c b dend{pmatrix} = (ax + by, cx + dy).The set of all such real matrices is denoted by M(2,R). Two… …
