OCA talk:Day & Night
This page seems to have suffered a severe mauling during the past day or two, and it is not clear that the results have been all that favourable, or even comprehensible. What is the "inverse" of a rule? How about putting in a return map which would clarify the self-complementarity of the rule? A reversion would be in order if I knew how to do it, and if I didn't want to lose that sample evoulution. Even though I feel a better one could be found.