## Abstract Let (𝒳, __d__,__μ__) be a space of homogeneous type in the sense of Coifman and Weiss. Assuming that __μ__ satisfies certain estimates from below and there exists a suitable Calderón reproducing formula in __L__ ^2^(𝒳), the authors establish a Lusin‐area characterization for the atomic
On Internal Characterizations of CompletelyL-Regular Spaces
✍ Scribed by Tomasz Kubiak; Marı́a Angeles de Prada Vicente
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 208 KB
- Volume
- 216
- Category
- Article
- ISSN
- 0022-247X
No coin nor oath required. For personal study only.
✦ Synopsis
Complete L-regularity is internally characterized in terms of separating chains of open L-sets. A possible characterization in terms of normal and separating families of closed L-sets is discussed and it is shown that spaces admitting such families are completely L-regular. The question of whether the converse holds true remains open. Some partial solutions are however given, e.g. in the class of countably compact spaces. ᮊ 1997 Academic Press
L
, where L is a hypercontinuous lattice, in particular, a completely L w x distributive one. For these results see 17 . There are also further results, 581
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