Department of

# Mathematics

Seminar Calendar
for events the day of Friday, January 28, 2005.

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Friday, January 28, 2005

4:00 pm in 141 Altgeld Hall,Friday, January 28, 2005

#### Organizational Meeting

4:00 pm in 245 Altgeld Hall,Friday, January 28, 2005

#### A Threshold Growth Cellular Automata: Bootstrap Percolation

###### Jozsef Balogh (Ohio State University)

Abstract: Cellular automata were introduced by von Neumann after a suggestion of Ulam. A very popular cellular automaton is Conway's "Game of Life". Bootstrap percolation, a deterministic threshold growth model of cellular automata with random initial condition, was introduced by statistical physicists in the early 1980s. In this talk I shall briefly survey the history of bootstrap percolation, and then present some recent results from a number of papers written jointly with B. Bollobas, Y. Peres and G. Pete.