Let A be a set and let a and b be two distinct elements of A. A distance d : A A Ris
Chapter 16, Problem 16.5(choose chapter or problem)
Let A be a set and let a and b be two distinct elements of A. A distance d : A A Ris defined as follows:d(x, y) =0 if x = y1 if {x, y} = {a, b}2 if x = y and {x, y} = {a, b}.Which of the four properties of a metric space are satisfied by this distance?
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