Def x:A. B(x) == x:AB(x)

is mentioned

In prior sections: core fun 1 well fnd int 1 bool 1 int 2 list 1 sqequal 1 union rel 1 mb basic mb nat mb list 1 num thy 1 mb list 2 mb event system 1 mb event system 2 mb event system 3 mb event system 4 mb event system 5 mb event system 6 mb event system 7

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