T:Type, m, n:, f:({m..n}T). f{m..n}  T List 

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Definitions	S  T, S  T, , ij, {...i}, f{m..n}, t  T, {i..j}, x:A. B(x), i>j, AB, P & Q, i  j < k, P  Q, False, A, Prop, True, i<j, b, b, , ij, T, P  Q, P  Q, Unit, P  Q, Dec(P)
Lemmas	int seg wf, decidable lt, eqtt to assert, assert of le int, iff transitivity, eqff to assert, squash wf, true wf, bnot of le int, assert of lt int, le int wf, bool wf, bnot wf, assert wf, lt int wf, le wf, int lower wf, not wf, gt wf, ge wf, nat properties, nat wf