Graphical Representation of Fourier Series from Fourier Transformation

Understanding the derivation process from Fourier's number to Fourier transformation is an important part in the study of Fourier transformation. This paper uses the graphical representation method of mathematics subject knowledge, clarifies the connection between the knowledge points in the process of Fourier's transformation, chooses the appropriate kind of illustration, and represents the derivation process of the Fourier series by illustration, and achieves the effect of image specific and reduces the difficulty of understanding in learning.