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2 cards from this section. Quick, good the night before a test.
What is a relation?
Think of how elements in both sets relate.
Define a reflexive relation.
Consider why the diagonal matters.
What is a relation in mathematics?
Think about how two sets interact.
True or False: A reflexive relation must have all diagonal elements in the matrix representation as 1.
Remember the definition of reflexive relations.
If set A contains three elements and set B contains four elements, how many unique binary relations can be formed?
Calculate the product of the number of elements and use the power of 2.
Create a reflexive relation matrix for set A = {1, 2, 3}. Then add additional pairs while keeping it reflexive.
Focus on maintaining those diagonal 1s.
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