[next] [prev] [up] Date: Thu, 17 Jul 80 14:38:00 -0400 (EDT)
[next] [prev] [up] From: Bernard S. Greenberg <Greenberg.Multics@MIT-Multics >
[next] [prev] [up] Subject: Re: the cross design

There are two such sets of patterns known, one with three
sets of paired colors (the Christman cross) and one
with two triplets of colors (the Plumer cross).
The Plummer cross is achieved by two orthogonal applications
of the transform to the Christman cross. The transforms are
fairly long and hairy, and I hesitate a little before attempting
to describe them, but will if people want.

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