Generating the octad generator The Miracle Octad Generator (MOG) of R. T. Curtis — A correspondence between the 35 partitions of an 8-set into two 4-sets and the 35 lines of PG(3,2).
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Symmetry invariance under M12 A generalization of the two-color plane patterns, made up of all-black and all-white squares, that underlie plane patterns, made up of two-color diagonally-divided squares, of diamond theory.