theorem :: LOPBAN10:52

for X being RealNormSpace-Sequence
for Y being RealNormSpace
for f, g, h being Point of (R_NormSpace_of_BoundedMultilinearOperators (X,Y)) holds
( h = f - g iff for x being VECTOR of (product X) holds h . x = (f . x) - (g . x) )