let R be Ring; :: thesis: for V being RightMod of R
for A, B being Subset of V
for l being Linear_Combination of A st A c= B holds
l is Linear_Combination of B
let V be RightMod of R; :: thesis: for A, B being Subset of V
for l being Linear_Combination of A st A c= B holds
l is Linear_Combination of B
let A, B be Subset of V; :: thesis: for l being Linear_Combination of A st A c= B holds
l is Linear_Combination of B
let l be Linear_Combination of A; :: thesis: ( A c= B implies l is Linear_Combination of B )
assume A1: A c= B ; :: thesis: l is Linear_Combination of B
Carrier l c= A by Def7;
then Carrier l c= B by A1, XBOOLE_1:1;
hence l is Linear_Combination of B by Def7; :: thesis: verum