*Instructor: *Dr Gyula Y. KATONA

*Text:* Michael Sipser: Introduction to the Theory
of Computation, Springer

*Prerequisite*:
Prerequisite: some introductory combinatorics (e.g.
definitions and basic properties of graphs, binomial coefficients,
primes) is helpful, but not absolutely necessary.

*Course description:*

- Finite automata, regular and non-regular languages, pumping lemma.
- Context-Free languages.
- Turing Machines, universal Turing machines. The existence of universal Turing machines.
- Recursive functions. Recursive, recursively enumerable languages.
- Algorithmic decidability, Halting problem and other undecidable problems.
- Storage and time, general theorems on space and time complexity
- Non-deterministic Turing-machines. NP and co-NP.
- Cook's theorem: SAT is NP-complete. Other NP-complete problems.
- Kolmogorov-complexity of sequences.

The course has very little connection to programming, you don't need to know how to write programs. It is about the theoretical questions that arise from computers. Consider it more mathematics than computer science. However, nowadays every mathematician should know something about complexity theory.

Grading:

Homework: 4 problems/week (1 easy, 2 medium, 1 hard). Working in groups
is allowed, but write down your own version of the solution (and be
sure it is correct). The worst 2 homework sets are dropped.

Midterm: 6 problems, open book, open notes, 2 hours in class

Final: 2 theory questions, closed book; 4 problems, open book, open
notes, 2 hours in class

Homework 30%, Midterm 30%, Final 40%

90% A+, 85% A, 80% A-, 75% B+, 70% B