Abscissa and ordinate Abscissa and ordinate In mathematics, the abscissa (; plural "abscissae" or "abscissæ" or "abscissas") and the ordinate are respectively the first and second coordinate of a point in a coordinate system. The abscissa of a point is the signed measure of its projection on the primary axis, whose absolute value 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). The ordinate of a point is the signed measure of its projection on the secondary axis, whose absolute value
Graph product lexicographic product serves as a reminder that this product is not commutative. Graph product In mathematics, a graph product is a binary operation on graphs. Specifically, it is an operation that takes two graphs "G" and "G" and produces a graph "H" with the following properties: The terminology and notation for specific graph products in the literature varies quite a lot; even if the following may be considered standard, readers are advised to check what definition a particular author uses for a graph product, especially in older texts. The following table shows the most common graph products, with formula_1 denoting