# Posts

### Cauchy's integral formula and Taylor series

Cauchy’s integral formula defines analytic function evaluation with path integral with denominator translation at evaluation point …

### Primitive function

The presence of primitive function is a strong condition that makes a function is analytic in a disc $$D(a,R)$$. The meaning is the …

### Approximation

The purpose of approximation is finding optimal point $$x^*$$ i.e. $$\nabla F(x^*) = 0$$. We need a step/search direction $$\Delta x$$ …

### Singular vector decomposition

Bases are the central idea of linear algebra. An invertable square matrix has eigenvectors. A symetric matrix has orthogonal …