It is interesting to share knowledge with other!
Theorem 1(Erdos):A mathematician is a device for turning coffee into theorems.
Theorem 2(Zhiqiang Xu): Zhiqiang Xu is not a mathematician.
Proof: Because my name is Zhiqiang Xu, we only need to prove "I am not a mathematician". After drinking a cup of coffe, I have a toothache. Hence, I can not think and then I can not prove anything. So, I can not turn a cup of coffee into a theorem. According to Theorem 1, I am not a mathematician.
Lecture 1 Weierstrass Theorem and Convolution Approximation
Lecture 2 Fourier Series
Lecture 3 Fourier Transform
Lecture 4 Polynomial Interpolation
Lecture 5 Generalized Fourier Series
Lecture 6 B Spline Functions
Lecture 7 Box Spline Functions
Lecture 8 Wavelets，1
Lecture 9 Wavelets，2
Lecture 10 Wavelets，3
Lecture 11 Wavelets，4
Lecture 12 Wavelets，5