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The binary relation set R = { (C1,b), (C1,f), (C1,j), (C2,b), (C2,d),…, (C5,e), (C5,h)} can be represented as (a) a relation matrix, (b) a directed bipartite graph, and (c) a concept lattice. Colored rectangles in the relation matrix represent concepts. The same color represents the same concept in (a) and (c). (Modified from [13]).
