{\rtf1\ansi\ansicpg1252\cocoartf949\cocoasubrtf540 {\fonttbl\f0\fswiss\fcharset0 Helvetica;} {\colortbl;\red255\green255\blue255;} \paperw11900\paperh16840\margl1440\margr1440\vieww9000\viewh8400\viewkind0 \deftab720 \pard\pardeftab720\ql\qnatural \f0\fs24 \cf0 Andrei Toom\ \ "Solvable and unsolvable in Cellular Automata"\ \ 1) The problem of ergodicity for cellular automata\ 2) The problem of eroders for cellular automata}