Journal of Prime Research in Mathematics

# Boyd indices for quasi-normed rearrangement invariant spaces

Insitute of Mathematics and Informatics, Bulgarian Academy of Sciences and Abdus Salam School of Mathematical Sciences, GC University, Lahore, Pakistan.

$$^{1}$$Corresponding Author: geremika@yahoo.com

### Abstract

We calculate the Boyd indices for the sum and intersection of two quasi-normed rearrangement invariant spaces. An application to Lorentz type spaces is also given.

#### Keywords:

Rearrangement invariant function spaces, Boyd indices, interpolation spaces.