take (1,1) --> (In (1,REAL)) ; :: thesis: ( (1,1) --> (In (1,REAL)) is Positive & (1,1) --> (In (1,REAL)) is Nonnegative )
thus ( (1,1) --> (In (1,REAL)) is Positive & (1,1) --> (In (1,REAL)) is Nonnegative ) ; :: thesis: verum