A Latin square is an n × n table filled with n different symbols in such a way that each symbol occurs exactly once in each row and exactly once in each column.
These occur as the multiplication tables of a quasigroup.
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... of their teaching, together the Ecumenical creeds of the Christian Church: Athanasian Creed, Nicene Creed, Chalcedon, and the common creed ("Apostles' Creed"). Regional ...