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.
If the work order is still in progress, the system only computes the. equivalent manpower up through to the current effective date of time. charges (the date that the last time charges for all projects were. processed by the system). The system also assumes that the manpower is level loaded over the. actual duration.