This paper shows briefly that, in the above paper by Curtain et al. (see ibid. vol.41 (1996)), there is a slight mistake in the proof of lemma 11.3 and in formula (17) of lemma 111.3. Corrections for formula (17) and a lemma related to it are given.
['Hao Lu', 'Huajing Fang', 'Xinhan Huang']
Comments on "A weighted mixed-sensitivity H/sub /spl infin//-control design for irrational transfer matrices"