Qiuzhen Lectures on Functinal Analysis
Some historical versions
This is the latest version used in the Functional Analysis course for Qiuzhen College in Fall 2025.
Updates after this version: Section 2.2 has been revised to clarify the overall structure of the section and the purpose of each subsection. Subsec. 4.2.3 has been revised to better present the relationship between the sesquilinear form determined by the Hankel matrix and the polynomial moments.