Abscissa and ordinate is the distance between the projection and the origin of the axis, and whose sign is given by the location on the projection relative to the origin (before: negative; after: positive). Usually these are the horizontal and vertical coordinates of a point in a two-dimensional rectangular Cartesian coordinate system. The terms can also refer to the horizontal and vertical axes respectively (typically "x"-axis and "y"–axis) of a two-dimensional graph. An ordered pair consists of two terms—the abscissa (horizontal, usually "x") and the ordinate (vertical, usually "y")—which define the location of a point in two-dimensional rectangular space. Though the word "abscissa"
Minimum rank of a graph Minimum rank of a graph In mathematics, the minimum rank is a graph parameter formula_1 for any graph "G". It was motivated by the Colin de Verdière's invariant. The adjacency matrix of a given undirected graph is a symmetric matrix whose rows and columns both correspond to the vertices of the graph. Its coefficients are all 0 or 1, and the coefficient in row "i" and column "j" is nonzero whenever vertex "i" is adjacent to vertex "j" in the graph. More generally, one can define a "generalized adjacency matrix" to be any matrix of real numbers with the same