1.

Let W denote the words in the English dictionary. Define the relation R by R={(x,y)ϵW×W| the words x and y have at least one letter in common.} Then R is

Answer»

Let W denote the words in the English dictionary. Define the relation R by R={(x,y)ϵW×W| the words x and y have at least one letter in common.} Then R is



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