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Sticky Note
In set theory, what does the * symbol represent in the context of Cartesian products?
  1. Union of sets
  2. Intersection of sets
  3. Multiplication of sets
  4. Cartesian product of two sets
Explanation
  • In set theory, the Cartesian product of two sets A and B is written as A × B (sometimes represented with * in programming contexts).
  • It produces a set of all ordered pairs (a, b) where a ∈ A and b ∈ B.
  • Union combines elements from both sets without pairing.
  • Intersection finds elements common to both sets.

  • Cartesian products are useful in relations, databases, and combinatorics.

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