let S be non empty non void ManySortedSign ; :: thesis: for A being non-empty MSAlgebra over S
for R being stable ManySortedRelation of A holds StabCl R = R
let A be non-empty MSAlgebra over S; :: thesis: for R being stable ManySortedRelation of A holds StabCl R = R
let R be stable ManySortedRelation of A; :: thesis: StabCl R = R
( StabCl R c= R & R c= StabCl R ) by Def12;
hence StabCl R = R by PBOOLE:146; :: thesis: verum