Clayton Shonkwiler

Math 618

Instructor: Clayton Shonkwiler
Time: Monday, Wednesday, Friday, 3:00–4:00
Location: Engineering E206
Office: Weber 206C
Office Hours: Wednesday 1:00–2:00 and Thursday 9:30–10:30 in Weber 017, or by appointment
Email Address:
Text: Topics in Linear and Nonlinear Functional Analysis, by Gerald Teschl


The course will be an introduction to Hilbert and Banach spaces, with applications to Fourier analysis and partial differential equations.

We will start with the basic theory of infinite-dimensional vector spaces and operators and come to grips with standard function spaces like \(L^2\) and their connections to Fourier analysis. Then we will develop the theory of compact operators, with applications to Sturm–Liouville problems and linear PDEs. After introducing the main technical tools for Banach spaces, including Baire’s theorem and the Hahn–Banach theorem, we will end with some spectral theory, including the Gelfand representation theorem.

Familiarity with basic real analysis (e.g., baby Rudin) is important, as is good working knowledge of (finite-dimensional) linear algebra.

The following books may be useful additional resources: