let GF be non empty right_complementable associative well-unital distributive Abelian add-associative right_zeroed doubleLoopStr ; :: thesis: for V being non empty right_complementable vector-distributive scalar-distributive scalar-associative scalar-unital Abelian add-associative right_zeroed VectSpStr of GF
for W1, W2 being Subspace of V holds (0). W1 is Subspace of W2
let V be non empty right_complementable vector-distributive scalar-distributive scalar-associative scalar-unital Abelian add-associative right_zeroed VectSpStr of GF; :: thesis: for W1, W2 being Subspace of V holds (0). W1 is Subspace of W2
let W1, W2 be Subspace of V; :: thesis: (0). W1 is Subspace of W2
(0). W1 = (0). W2 by Th48;
hence (0). W1 is Subspace of W2 ; :: thesis: verum