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The statement

div: N x N -> Q
div(x, y) := x/y;

is to be read as the formula

div = {<<x, y>, x/y>: x in N, y in N} /\ 
(forall x in N, y in N: div(x, y) in Q).

Claim about function range has to be proved.

Author: Wolfgang Schreiner
Last Modification: October 14, 1999

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