Arazy-Cwikel property for quasi-banach couples

The main result of this paper establishes that the known Arazy-Cwikel property holds for classes uniformly K-monotone spaces in quasi-Banach setting provided initial couple is mutually closed. As a consequence, we get class all K-spaces (i.e., interpolation which are described by real K-method) with respect to an arbitrary closed Banach enjoys property. Moreover, show also whenever couples involved have uniform Calderón-Mityagin This complements and refines previous results Bykov-Ovchinnikov even case spaces. We apply obtained some classical families