Combinatorics and Graph Theory

Almost QR

Authors: Elmar Guseinov
Comments: 2 Pages. In Russian

Consider the following five matrices corresponding to black and white square patterns: ((0,0,0),(0,0,0),(0,0,0)), ((0,0,0),(1,1,0),(0,1,0)), ((0,1,0),(0,1,0),(0,1,0)), ((0,1,0),(1,1,0),(0,1,0)), ((0,1,0),(1,1,1),(0,1,0)). You can rotate these matrices clockwise and after that choose four of them (possibly repeated) to build up a big 6x6 pattern. How many big patterns can be obtained if the clockwise rotation gives the same big pattern?
Category: Combinatorics and Graph Theory