5.7 Intro to Binary Relations

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Across
  1. 2. What representation of relation R between A and B is a rectangular array of numbers of |A| rows and |B| columns?
  2. 4. For a ∈ A and b ∈ B, if aRb, then entry in row a and column b is what number?
  3. 5. (Hyp) Using an arrow diagram, what is it called when an element points to itself?
  4. 6. Type of relation that expresses a relationship between two sets
  5. 8. A binary relation between sets A and B is a _______ R of A × B
Down
  1. 1. (2 words) A binary relation R between A and B is represented by a list of _________ _______.
  2. 3. For a ∈ A and b ∈ B, if no aRb, then entry in row a and column b is what number?
  3. 7. For a ∈ A and b ∈ B, (a,b) ∈ R is denoted by?