The basic knowledge of operational research includes real analysis, matrix theory, stochastic process, discrete mathematics and algorithm basis.

Fuzzy mathematics takes uncertain things as the research object.

It is one of the important fields of computer application.

Differential equations in which unknown functions are univariate functions are called ordinary differential equations.

However, most ordinary differential equations can only get approximate solutions but not exact solutions.

It is easier to understand and simpler than ordinary differential equations with formulas.