let N be with_non-empty_elements set ; :: thesis: for S being non empty IC-Ins-separated Mem-Struct of N
for l being Nat holds DataPart (Start-At (l,S)) = {}
let S be non empty IC-Ins-separated Mem-Struct of N; :: thesis: for l being Nat holds DataPart (Start-At (l,S)) = {}
let l be Nat; :: thesis: DataPart (Start-At (l,S)) = {}
Data-Locations misses {(IC )} by XBOOLE_1:79;
then Data-Locations misses dom (Start-At (l,S)) by FUNCOP_1:13;
hence DataPart (Start-At (l,S)) = {} by RELAT_1:66; :: thesis: verum