let G be finite _Graph; :: thesis: for L being MCS:Labeling of G
for v, x being set st x in dom (L `1 ) holds
(L `2 ) . x = ((MCS:LabelAdjacent L,v) `2 ) . x
let L be MCS:Labeling of G; :: thesis: for v, x being set st x in dom (L `1 ) holds
(L `2 ) . x = ((MCS:LabelAdjacent L,v) `2 ) . x
let v, x be set ; :: thesis: ( x in dom (L `1 ) implies (L `2 ) . x = ((MCS:LabelAdjacent L,v) `2 ) . x )
assume A1: x in dom (L `1 ) ; :: thesis: (L `2 ) . x = ((MCS:LabelAdjacent L,v) `2 ) . x
set V2G = L `2 ;
set VLG = L `1 ;
set GL = MCS:LabelAdjacent L,v;
set V2 = (MCS:LabelAdjacent L,v) `2 ;
A2: (MCS:LabelAdjacent L,v) `2 = (L `2 ) .incSubset ((G .AdjacentSet {v}) \ (dom (L `1 ))),1 by MCART_1:def 2;
not x in (G .AdjacentSet {v}) \ (dom (L `1 )) by A1, XBOOLE_0:def 5;
hence (L `2 ) . x = ((MCS:LabelAdjacent L,v) `2 ) . x by A2, Def4; :: thesis: verum