MATH 655 Section 600
Functional Analysis I
Fall 2025
Instructor: Florent Baudier
Office: Blocker 525J
Office hours: TR 1:00-2:00 p.m. or by appointment
Lectures: TR 2:20 p.m.-3:35 p.m. BLOC 148
Course description: Normed linear spaces, duality theory, reflexivity, basis theory, structure theory of Banach spaces.
Textbooks:
  • Topics in Banach Space Theory, F. Albiac and N. Kalton
  • Classical Banach spaces I, Y. Lindenstrauss and L. Tzafriri
  • A Short Course on Banach Space Theory, N. L. Carothers
  • An Introduction to Banach Space Theory, R. E. Megginson
  • Banach Space Theory (The Basis for Linear and Nonlinear Analysis), M. Fabian, P. Habala, P. Hajek, V. Montesinos, V. Zizler
  • Exams
    Homework  
    Schedule
    Date of Class Material covered
    Tuesday 08/26 Introduction, Dual pairs
    Thursday 08/28 Banach-Alaoglu, weak and weak* topologies
    Tuesday 09/02 Hahn-Banach theorem in locally convex topological vector spaces, Goldstine Theorem, Mazur's Theorem
    Thurssday 09/04 Eberlein-Smulian Theorem
    Tuesday 09/09 Eberlein-Smulian Theorem
    Thursday 09/11 Helly's Theorem, Topological and geometric characterization of reflexivity
    Tuesday 09/16 Topological and geometric characterization of reflexivity
    Thursday 09/18 Local structure of Banach spaces: finite representability, ultrapoducts of Banach spaces
    Tuesday 09/23 Local structure of Banach spaces: principle of local reflexivity, bidual of spaces of bounded operators
    Thursday 09/25 Local structure of Banach spaces:principle of local reflexivity, bidual of spaces of bounded operators
    Tuesday 09/30 Basis theory: Schauder bases, equivalence of bases, basic sequences
    Thursday 10/02 Basis theory: Schauder bases, equivalence of bases, basic sequences
    Tuesday 10/07 small perturbation principle(s)
    Thursday 10/09 block basic sequences
    Tuesday 10/14 Fall break
    Thursday 10/16 Bessaga-Pelczynski selection principle, subspaces of ℓp
    Tuesday 10/21 Shrinking bases
    Thursday 10/28 Boundedly complete bases, duality, James' reflexivity theorem
    Tuesday 10/28 Unconditionally convergent series in Banach spaces: Orlicz's theorem
    Thursday 10/30 Unconditional bases, James' structure theorems
    Tuesday 11/04 Khitchine's inequality and application to Hilbertian subspaces of Lp
    Thursday 11/06 Orlicz's theorem for unconditionally convergent sequences in Lp 1≤ p≤ 2.
    Tuesday 11/11 Class does no meet
    Thursday 11/13 Kadec-Pelczynski theorem, dichotomy for subspaces of Lp.
    Tuesday 11/18 Banach-Saks theorem, definition and first properties of type and cotype
    Thursday 11/20 type and cotype of Lp-spaces, separable Banach spaces as quotients of ℓ1
    Tuesday 11/25 class does not meet
    Thursday 11/27 Thanksgiving break
    Tuesday 12/02 uniform convexity, Milman-Pettis theorem, p-uniformy convexity: definition and examples, connection with cotype
    Thursday 12/04 James ℓ1 theorem, Tsirelson space