Erratum: On closed boundary value problems for equations of mixed elliptic-hyperbolic type

There is an error in the proof of Theorem 3.4 in the article referenced above. It consists of applying the degenerate elliptic estimate (3.24) to a function u that has compact support in Ωˆ but will not, in general, vanish along the parabolic line. A corrected proof involves a different argument and will appear together with additional results in a later paper.