(NgRANI^N)QÆ WLASTIWOSTÆ GLADKIH U [ARÆ ROZW(B'(NQZKÆW RÆWNQNX PARABOLÆ^NOGO TIPU (B/s)E - (NgORODECXKIJ(B, (Nw(B. (Nw(B.s; (N~du )QÆM(B. (N`(B.(NfEDXKOWI^A(B.s)E ((N~ERN)QÆWCÆ (B:s)E (NrUTA(B,s, 1998)