Kramer's method represents the algorithm allowing to solve the system of the linear equations by means of a matrix. The author of a method is Gabriel Kramer living in the first half of the 18th century.
The matter belongs to the solution of the uniform linear differential equations of n-go of an order. At the same time is proved, but search of the system of decisions called fundamental (for short FSR) hesitates on concrete examples, which linear combination of functions gives the common decision of the differential equation.