:: deftheorem Goedel defines Goedel_implication FUZIMPL1:def 16 :
for b₁ being BinOp of [.0,1.] holds
( b₁ = Goedel_implication iff for x, y being Element of [.0,1.] holds
( ( x <= y implies b₁ . (x,y) = 1 ) & ( x > y implies b₁ . (x,y) = y ) ) );