# Logic and Computation I

**Lecturer:** Kazuyuki Tanaka (Research Fellow)

**Time:** 10:40 - 12:15, Tue,Thu, 10/27/2022 - 12/27/2022

**Venue:** 1110

**Online:** Zoom: 928 682 9093 PW: BIMSA

**Record:** Yes

**Level:** Graduate

**Language:** English

**Prerequisite**

Completion of undergraduate course on logic, set theory or automata theory is recommended. But all interested students are welcome.

**Abstract**

This is an advanced undergraduate and graduate-level course in mathematical logic and theory of computation. Topics to be presented in the first semester include: computable functions, undecidability, propositional logic, NP-completeness, first-order logic, Goedel's completeness theorem, Ehrenfeucht-Fraisse games, Presburger arithmetic.

In the second semester, we will move on to Goedel's incompleteness theorems, second-order logic, infinite automata, determinacy of infinite games, etc.

**Reference**

[1] H.D. Ebbinghaus, H. Flum and W. Thomas, Mathematical Logic, 3rd ed., Springer 2021.

[2] D.C. Kozen, Theory of Computation, Springer 2006.

[3] K. Tanaka, 計算理論と数理論理学 (Mathematics of Logic and Computation, in Japanese), Kyoritsu 2022.

**Syllabus**

"Logic and Computation I" consists of the following three parts.

Part 1. Introduction to Computational Theory

Fundamentals on theory of computation and computability theory (recursion theory) of mathematical logic, as well as the connection between them.

This part is the basis for the following lectures.

Part 2. Propositional Logic and Computational Complexity

The basics of propostional logic (Boolean algebra) and complexity theory including some classical results, such as the Cook-Levin theorem.

Part 3. First Order Logic and Decision Problems

The basics of first-order logic, Goedel's completeness theorem, and the decidability of Presburger arithmetic.

We will use Ehrenfeucht-Fraisse game as a basic tool of first-order logic, and apply it to prove Lindstrom's theorem.

In "Logic and Computation II", we will move on to Goedel's incompleteness theorem, second-order logic, infinite automata, determinacy of infinite games, Post's problem, the Kondo-Addison theorem, admissible sets, alpha-recursion theory, etc.

**Lecturer Intro**

Kazuyuki Tanaka received his Ph.D. from U.C. Berkeley. Before joining BIMSA in 2022, he taught at Tokyo Inst. Tech and Tohoku University, and supervised fifteen Ph.D. students. He is most known for his works on second-order arithmetic and reverse mathematics, e.g., Tanaka's embedding theorem for WKLo and the Tanaka formulas for conservation results. For more details: https://sendailogic.com/tanaka/

**Lecturer Email:** __tanaka.math@tohoku.ac.jp__

**TA:** Dr. Wenjuan Li, __liwj@bimsa.cn__