for f1, f2 being PartFunc of REAL,REAL st f1 is convergent_in-infty & f2 is_right_convergent_in lim_in-infty f1 & ( for r being Real ex g being Real st
( g < r & g in dom (f2 * f1) ) ) & ex r being Real st
for g being Real st g in (dom f1) /\ (left_open_halfline r) holds
lim_in-infty f1 < f1 . g holds
( f2 * f1 is convergent_in-infty & lim_in-infty (f2 * f1) = lim_right (f2,(lim_in-infty f1)) )