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B×C denotes the Cartesian product of sets B and C. It is the set of all ordered pairs (b, c) where b belongs to B and c belongs to C.
Formally, B×C = { (b, c) | b ∈ B and c ∈ C }. The order of the factors matters: B×C
Cardinality and size: If B and C are finite with |B| = m and |C| = n, then |B×C|
Examples help: if B = {1, 2} and C = {a, b, c}, then B×C = { (1, a), (1,
Related topics include set-theoretic operations on Cartesian products, properties of projections, and the role of Cartesian