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- Newsgroups: comp.theory.cell-automata
- Path: sparky!uunet!secapl!Cookie!frank
- From: frank@Cookie.secapl.com (Frank Adams)
- Subject: Crystals in Life
- Message-ID: <1992Sep11.204742.107084@Cookie.secapl.com>
- Date: Fri, 11 Sep 1992 20:47:42 GMT
- Organization: Security APL, Inc.
- Lines: 10
-
- I have done some playing around with infinite stable patterns in Conway's
- game of Life. I call such patterns crystals.
-
- (1) Has there been any investigation of this? A reference would be
- appreciated.
-
- (2) I would like to prove that no crystal can have a density greater than
- 1/2. 1/2 is easy to achieve; just fill space with the rectangle "O." (for
- example). I can establish an upper bound of 6/11 easily enough, but I
- haven't managed to do better.
-