Brzozowski's conjecture: Start from any word w, and replace any occurrence uwn x by uwn+1 x or vice versa. Is the resulting language regular? This is easily seen for n = 1, and it has been proven for n ≥ 3. The case n = 2 is still open.

-- JeffreyShallit - 13 Jul 2011

Topic revision: r1 - 2011-07-13 - JeffreyShallit
 
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