is mentioned by

Thm* f:{T}. (x,y,z:T. f(x,y) f(y,z) f(x,z)) & (x,y:T. f(x,y) f(y,x)) & (x:T. f(x,x)) & f TT	[equivalence_properties]
Thm* Dec(P) Dec(Q) ((P & Q) P Q)	[demorgan2]
Thm* Dec(P) Dec(Q) ((P Q) P & Q)	[demorgan1]
Thm* Dec(P) Dec(Q) ((P Q) P & Q)	[demorgan]
Def {T} == {f:(TT)| (x:T. (f(x,x))) & (x,y:T. (f(x,y)) (f(y,x))) & (x,y,z:T. (f(x,y)) (f(y,z)) (f(x,z))) }	[equivalence]

In prior sections: core int 1 bool 1 discrete jlc