-definition tlt : \forall A,N. T A N \to T A N \to Prop \def \lambda A,N. \lambda t1,t2. (lt (weight A N t1) (weight A N t2)).
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+definition tlt: \forall A,N. T A N \to T A N \to Prop \def
+ \lambda A,N,t1,t2.
+ weight A N t1 < weight A N t2.