:: deftheorem Def6 defines LinearOperators LOPBAN_1:def 6 :
for X, Y being RealLinearSpace
for b₃ being Subset of (RealVectSpace ( the carrier of X,Y)) holds
( b₃ = LinearOperators (X,Y) iff for x being set holds
( x in b₃ iff x is LinearOperator of X,Y ) );