# Module MA3421: Functional Analysis I

**Credit weighting (ECTS)**- 5 credits
**Semester/term taught**- Michaelmas term 2018-19
**Contact Hours**- 11 weeks, 3 lectures including tutorials per week
**Lecturer**- Prof John Stalker
**Learning Outcomes**- On successful completion of this module, students will be able to:
- Give the appropriate definitions, theorems and proofs concerning the syllabus topics, including topics in general topology, elementary theory of Banach spaces and of linear operators;
- Solve problems requiring manipulation or application of one or more of the concepts and results studied;
- Formulate mathematical arguments in appropriately precise terms for the subject matter;
- Apply their knowledge in mathematical domains where functional analytic techniques are relevant;

**Module Content**-
- General Topology: Review of metric spaces, definition of topological space, open/closed/boundary, continuity, limits of sequences, compactness, bases, second countability, separability, sub-bases, weak and product topologies, neighbourhood bases, first countability.
- Normed and Banach spaces: Definitions and examples for Banach spaces and bounded linear operators. Examples include some `classical' Banach spaces $C(X)$, $\ell^p$, $c_0$, $L^p([0,1])$ and more general $L^p$ examples ($1 \leq p \leq \infty$). Use of series in Banach spaces (convergent or absolutely convergent), basic concepts from Lebesgue integration. we show Hölder's and Minkowski's inequalities (vesions for sums and integrals). $\ell^p$ increases with $p$ while $L^p([0,1])$ decreases and the inclusion maps as examples of operators.
- Baire category theorem and some of its consequences (open mapping). An application to Fourier series.

For further information refer to the module web pages.

**Module Prerequisite**- MA2223-Metric Spaces and MA2224-Lebesque Integral are desirable
**Assessment Detail**-
This module will be examined in a 2 hour
**examination**in Michaelmas term.**Continuous assessment**will contribute 10% to the final grade for the module at the annual examination session.