Differential equations are equations that contain derivatives. The equations are used in calculus to describe relationships among one or more variables. A solution to any series of equations can be ...

A MECHANICAL calculating machine for solving simultaneous linear equations up to ten in number under construction at the Massachusetts Institute of Technology by Drs. V. Bush and J. B. Wilbur was ...

This is a preview. Log in through your library . Abstract In this paper, the authors develop a simultaneous equation model of birth rates composed of four estimated equations. This work differs from ...