fact: Fixpoint PS_incr_n (a : nat -> V) (n k : nat) : V := match n with | O => a k | S n => PS_incr_1 (PS_incr_n a n) k end.
imports: Coq(Reals Psatz ssreflect) Rcomplements Rbar Lim_seq Lub Hierarchy Continuity Derive Seq_fct Series