Question

universal relations from AtoB is denoted as
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Answer 1

Answer:

Universal relation is a relation on set A when A X A ⊆ A X A. In other words, universal-relation is the relation if each element of set A is related to every element of A. ... Both the void and universal relation are sometimes called trivial relations .

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Answer 2

Answer:

A relation R in a set, say A is a universal relation if each element of A is related to every element of A, i.e., R = A × A. Also called Full relation. Suppose A is a set of all natural numbers and B is a set of all whole numbers. The relation between A and B is universal as every element of A is in set B. Empty relation and Universal relation are sometimes called trivial relation.