A relation on A = {1, 2, 3, 4} is any subset of A × A, the empty relation included. How many relations on A are symmetric and transitive but not reflexive?

MathematicsAdvancedHigh School (11–12)Functions and Calculus › Relations and Functions JEE Advanced

A relation on $A = \{1, 2, 3, 4\}$ is any subset of $A \times A$ , the empty relation included. How many relations on $A$ are symmetric and transitive but not reflexive?

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