let S, T be non empty TopSpace; for s being Point of
for t being Point of
for l being Loop of [s,t] holds (FGPrIso s,t) . (Class (EqRel [:S,T:],[s,t]),l) = <*(Class (EqRel S,s),(pr1 l)),(Class (EqRel T,t),(pr2 l))*>
let s be Point of ; for t being Point of
for l being Loop of [s,t] holds (FGPrIso s,t) . (Class (EqRel [:S,T:],[s,t]),l) = <*(Class (EqRel S,s),(pr1 l)),(Class (EqRel T,t),(pr2 l))*>
let t be Point of ; for l being Loop of [s,t] holds (FGPrIso s,t) . (Class (EqRel [:S,T:],[s,t]),l) = <*(Class (EqRel S,s),(pr1 l)),(Class (EqRel T,t),(pr2 l))*>
let l be Loop of [s,t]; (FGPrIso s,t) . (Class (EqRel [:S,T:],[s,t]),l) = <*(Class (EqRel S,s),(pr1 l)),(Class (EqRel T,t),(pr2 l))*>
Class (EqRel [:S,T:],[s,t]),l is Point of
by TOPALG_1:48;
hence
(FGPrIso s,t) . (Class (EqRel [:S,T:],[s,t]),l) = <*(Class (EqRel S,s),(pr1 l)),(Class (EqRel T,t),(pr2 l))*>
by Th27; verum