theorem :: MOD_3:2

for R being Ring
for V being LeftMod of R
for L being Linear_Combination of V
for C being finite Subset of V st Carrier L c= C holds
ex F being FinSequence of the carrier of V st
( F is one-to-one & rng F = C & Sum L = Sum (L (#) F) ) by VECTSP_7:21;