LIMITING REAL INTERPOLATION SPACES

Limiting real interpolation spaces (A0;A1);q dened for = 0; 1 are important in a number of questions related to function spaces (see, for example (4,3)). In this talk we will revise some recent results on the case = 0 which show signicant changes in comparison with the classical theory of real interpolation. Results are part of joint works with L.M. Fern