Coding the Matrix: Linear Algebra through Computer Science Applications

by Philip N. Klein

Proposition 0.2.3: For finite sets A and B, |A × B| = |A|·|B|. Quiz 0.2.4: What is the cardinality of {1, 2, 3,..., 10, J, Q, K} × {♥, ♠, ♣, ♦}?