Authors: Yuri Menshikov
Mathematical description of physical process consists from the mathematical model of physical process and vector function of external load. In this work mathematical descriptions of physical processes which are being described by linear systems of ordinary differential equations are investigated. The algorithms of construction of the mathematical description of real process (for example the motion of some dynamic system) are considered which allows receive adequate results of mathematical simulation. Two basic approaches to this problem are selected. Within the framework of one of these approaches some algorithms are offered.