Question: For two sets A , B , the quantity J ( A , B ) = | A B | | B A | is

For two sets A,B, the quantity J(A,B)=|A B||B A| is known as the Jaccard similarity (between A and B). Show that if A,B,C are three sets, then the following inequality holds true. J(A,C) J(A,B)+ J(B,C)

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