This advanced-level functional analysis course covers the general topic of the function and operator theory as well as their applications in mathematical physics and astronomy: Advanced concepts of functional spaces, Banach algebras, subspaces, embedding of spaces, separable spaces, reflexive spaces. Foundations of the operator theory, bounded operators, invertible operators, restrictions and extensions of operators, Fredholm operators, Volterra operators, unbounded operators. Spectral theory, resolvent and spectrum, Hilbert-Schmidt theory and its application, Schatten-von Neumann classes, spectral properties of non-self-adjoint operators, biorthogonal systems. Symmetric rearrangements and applications, Hardy-Littlewood inequality, Riesz inequality, Polya-Szego inequality, Brownian motion in a ball, Optimal membrane shape for the deepest bass note, Maximiser body of the gravitational field energy, Dynamical stability problem of gaseous stars. Stability of symmetric steady states in galactic dynamics. Additionally the course will focus on applications of functional analysis in integral and differential equations arising engineering and mathematical physics.
Course learning outcomes
1. Demonstrate a comprehensive understanding of the fundamental principles of functional spaces (Banach algebras/spaces, subspaces, embedding of spaces, separable spaces, reflexive spaces etc…).
2. Establish and solve the operator equations.
3. Learn qualitatively restrictions and extensions of operators.
4. Learn the basic properties of bounded operators (Fredholm operators, Volterra operators etc) and unbounded operators (e.g. ordinary differential operators).
5. Acquire a basic knowledge of the spectral theory.
6. Learn the various applications of spectral theory in science, engineering, industry.
7. Develop their sense of rigour, logic and deduction when tackling a problem, and develop their analytical reasoning skills in problem-solving.
8. Demonstrate improvement in communication, reporting and writing skills by writing clear and soundly-argued solutions to problems.