Reply to "Comments on 'Strictly positive real transfer functions revisited'"

The authors wish to reassure the readers that the main result of the above paper, Lozano and Joshi (ibid., vol. 35, no. 11, p. 1243-45, 1990), i.e. Theorem 1, is not questioned in Marquez and Damaren (1995). The authors state that the commenters only question the validity of the proof of Lemma 1, which was a side result and not the main purpose of the paper. The authors agree that the commenters have a valid point which was overlooked in their proof of Lemma 1.3. The authors maintain, however, that Lemma 1 is valid at least in the finite dimensional linear time-invariant (LTI) case, which is the class of systems for which Theorem 1 is applicable.