Introduction - If you have any usage issues, please Google them yourself
Include:
Main-element Gauss elimination method for solving linear equations
Matrix LDLT and Cholesky decomposition
The catch-up method for solving tridiagonal equations
Jacobi and Gauss-Seidel method for solving equations
Newton interpolation polynomial and cubic spline interpolation polynomial
Complexification Simpson formula for solving the definite integral
Romberg method for solving the definite integral
The dichotomy and secant seeking nonlinear equation.