matrix: is a set of elements arranged in m rows MXN in columns, so it Akella k k j ka element is located in the row and y column j.mat kuadrada: now the same number of rows k colmnes. triangular mat top: k and all elements under the diagonal and triangular are 0.mat inf: k and all elements above the main diagonal are diagonal 0.mat: all elements outside the main diagonal identity son0.mat : if k in spatial array daigonal all elements son1.mat symmetrical matrix is symmetric if its transposada.mat = transposed: given a matrix M, its transposda M't is, and now the matrix k for the rows and columns of M colimnes rows M.mat symmetric: it is equal to their loposada transposda (B-B't) ie bij =- bij.els main elements of the diagonal must be 0. array opposite: the elements are equally convinats and an array of M = mij signe.donada its opposite, M = mij
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