Summary <p>This chapter introduces the Fourier series representation of continuous time periodic functions. A periodic function can be represented as a vector in an infinite&#x2010;dimensional space.

Time series are often complex and rich in information, but sparsely labeled andtherefore challenging to model. TNC is a self-supervised framework for learning representations for complex, multivariate ...

Summary <p>This chapter introduces the Fourier series representation of discrete time periodic functions. We represent discrete time periodic functions in a Hilbert space spanned by the orthogonal ...