let N be non empty with_non-empty_elements set ; :: thesis: for S being non empty IC-Ins-separated COM-Struct of N
for l being Element of NAT holds DataPart (Start-At (l,S)) = {}
let S be non empty IC-Ins-separated COM-Struct of N; :: thesis: for l being Element of NAT holds DataPart (Start-At (l,S)) = {}
let l be Element of NAT ; :: thesis: DataPart (Start-At (l,S)) = {}
Data-Locations S misses {(IC S)} \/ NAT by XBOOLE_1:79;
then Data-Locations S misses {(IC S)} by XBOOLE_1:70;
then Data-Locations S misses dom (Start-At (l,S)) by FUNCOP_1:19;
hence DataPart (Start-At (l,S)) = {} by RELAT_1:95; :: thesis: verum