1 Cubism was invented around 1907 in Paris by Pablo Picasso and Georges Braque. 2  Cubism was the first abstract style of modern art. 3  A Cubist painting ignores the traditions of perspective drawing and shows you many views of a subject at one time. 4  The Cubists introduced collage into painting.
Two linear systems using the same set of variables are equivalent if each of the equations in the second system can be derived algebraically from the equations in the first system, and vice versa.
equivalent - the atomic weight of an element that has the same combining capacity as a given weight of another element; the standard is 8 for oxygen. combining weight, eq, equivalent weight. atomic mass, atomic weight, relative atomic mass - (chemistry) the mass of an atom of a chemical element expressed in atomic mass units. tantamount. equal - having the same quantity, value, or measure as another; on equal terms; all men are equal before the law.