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From: lew@ihuxr.UUCP (Lew Mammel, Jr.)
Newsgroups: net.games.go,net.physics
Subject: Re: Solid State Go
Message-ID: <953@ihuxr.UUCP>
Date: Mon, 5-Mar-84 22:31:23 EST
Article-I.D.: ihuxr.953
Posted: Mon Mar  5 22:31:23 1984
Date-Received: Tue, 6-Mar-84 06:55:27 EST
Organization: AT&T Bell Labs, Naperville, IL
Lines: 8

Forget the glide planes! Everything I said was true, except for the
stuff about the glide planes.  There are no glide planes.  There
are only simple mirror planes (or lines if you prefer.)

Actually, this symmetry is quite common in floor tiling, except that
the unit cell usually has reflection symmetry about the diagonals as well.

	Lew Mammel, Jr. ihnp4!ihuxr!lew