:: deftheorem BLDef10 defines FormFunctional ZMATRLIN:def 21 :
for V, W being non empty ModuleStr over INT.Ring
for f being Functional of V
for g being Functional of W
for b₅ being Form of V,W holds
( b₅ = FormFunctional (f,g) iff for v being Vector of V
for w being Vector of W holds b₅ . (v,w) = (f . v) * (g . w) );