proposition: Lemma Rminus_Rlt : forall a b, 0 < a - b -> b < a.
proof: Proof. intros a b H. replace b with (b + 0)%R by ring. replace a with (b + (a - b))%R by ring. apply Rplus_lt_compat_l ; assumption. Qed.
imports: Rinterval Ranalysis_def Rpser_def Rpser_base_facts Rpser_cv_facts Rpser_sums Rpow_facts Rsequence_def Rsequence_facts Rseries_def Rseries_facts RFsequence_facts Cpow Cpser_def Cpser_base_facts CFsequence CFsequence_facts Csequence Csequence_def Csequence_facts Cmet Cnorm Ctacfield Cprop_base Canalysis_def Canalysis_cont Canalysis_deriv Canalysis_basic_facts