L:Top List, n:, m:(n+1). firstn(m;firstn(n;L)) ~ firstn(m;L) 

latex

Definitions	t  T, x:A. B(x), {i..j}, Top, Prop, {T}, P  Q, SQType(T), AB, P & Q, i  j < k, False, A, firstn(n;as), True, ij, b, b, , i<j, T, P  Q, P  Q, Unit
Lemmas	eqtt to assert, assert of lt int, iff transitivity, eqff to assert, squash wf, true wf, bnot of lt int, assert of le int, lt int wf, bool wf, bnot wf, assert wf, le int wf, le wf, top wf, int seg wf