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From: ACW@YUKON.SCRC.Symbolics.COM (Allan C. Wechsler)
Newsgroups: comp.theory.cell-automata
Subject: Re: on Life (and Death)
Message-ID: <19910328162012.4.ACW@PALLANDO.SCRC.Symbolics.COM>
Date: 28 Mar 91 16:20:00 GMT
References: <9103271751.aa05953@castle.ed.ac.uk>
Sender: tytso@athena.mit.edu (Theodore Y. Ts'o)
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    Date: Wed, 27 Mar 1991 12:51 EST
    From: Paul Crowley <aipdc@castle.edinburgh.ac.uk>

    What's the simplest known pattern that has no parent?

Winning Ways p. 829 gives:

xxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxx
x x x x x x xxxx xx xxx xxx xx xx
xxxxxxxxxxxxx x x xxx xxx xxx xx
x x x x x x xx xxxxx xxx xxx xxxx
 x x x x x x xxx x xxx xxx xx x x
xxxxxxxxxxxxxx xxxx xxx xxx xxxxx
 x x x x x x xxx xxxx xxx xxx x x
x x x x x x x x x xx xxx xxx x xx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

I understand Schroeppel was in the group that discovered this; I don't
know his net address but I've CC'd Gosper and perhaps he'd be willing to
forward to Schroeppel our request to hear the story of this monster's
discovery.