## William H. Barker

Isaac Henry Wing Professor of Mathematics

### Contact Information

barker@bowdoin.edu

207-725-3571

Mathematics

Searles Science Building - 105

### Teaching this semester

### MATH 2020. Introduction to Mathematical Reasoning

**William Barker**

An introduction to logical deductive reasoning and mathematical proof through diverse topics in higher mathematics. Specific topics include set and function theory, modular arithmetic, proof by induction, and the cardinality of infinite sets. May also consider additional topics such as graph theory, number theory, and finite state automata.

### MATH 3404. Projective and Non-Euclidean Geometries

**William Barker**

A survey of affine, projective, and non-Euclidean geometries in two-dimensions, unified by the transformational viewpoint of Kleinâ€™s Erlanger Programm. Special focus placed on conic sections and projective embeddings. Additional topics as time permits: complex numbers in plane geometry, quaternions in three-dimensional geometry, and the geometry of four-dimensional space-time in special relativity. Mathematics 2404 is helpful but not required.

### Education

- A.B. Binghamton University
- Ph.D. Massachusetts Institute of Technology

### Research Interests

- Geometry, Lie Theory, Analysis

### Books, Reports, and Monographs

*Continuous Symmetry: From Euclid to Klein*

William Barker and Roger Howe

Supplemental Materials (Errata, Revisions, Course Resources)

Review of *Continuous Symmetry* from MAA Reviews.

*Curriculum Foundations Project: Voices of the Partner Disciplines*

The individual reports are available for downloading

*Harmonic Analysis on Reductive Groups*

Edited by William Barker and Paul Sally

*L ^{p} Harmonic Analysis on SL(2,R)*

Further information on this Memoir.