MATH 255  ORDINARY DIFFERENTIAL EQUATIONS  Many important and significant problems in engineering, biology, physics, sociology, geography, psychology or economics, when formulated in mathematical terms, require the determination of a function satisfying an equation containing derivatives of the unknown function. Such equations are called differential equations. Perhaps the most familiar example is Newton’s law:     for the position s(t) of a particle acted on by a force F, which may be a function of time t, the position s(t), and the velocity ds(t))/dt. To determine the motion of a particle acted on by a given force F it is necessary to find a function s(t) satisfying the above equation.   This course examines some methods of solving certain types of differential equations Applications are stressed. Topics include first and secondorder linear differential equations, linear systems, nonlinear equations, series solutions, and Laplace transform methods.    PREREQUISITES/COREQUISITES   PREREQUISITES: MATH 112 COREQUISITES: MATH 211 and one of MATH 152, MATH 221, PHYS 221.    INTENDED AUDIENCE   Students who are interested in a career in mathematics and engineering.    TRANSFERABILITY   SFU, UVic and UBC.    COREQUISITES   MATH 211; and one of MATH 221 or PHYS 221 unless MATH 152 already completed. 

