𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Borel structures on the set of Borel mappings

✍ Scribed by Dimitris Georgiou; Ioannis Kougias; Athanasios Megaritis

Book ID
113933797
Publisher
Elsevier Science
Year
2012
Tongue
English
Weight
179 KB
Volume
159
Category
Article
ISSN
0166-8641

No coin nor oath required. For personal study only.

πŸ“œ SIMILAR VOLUMES

The normal form of Borel sets. Part II:
The normal form of Borel sets. Part II: Borel sets of infinite rank
✍ Jacques Duparc πŸ“‚ Article πŸ“… 1999 πŸ› Elsevier Science 🌐 English βš– 459 KB

## RBsumC. For each Bore1 set of reals of infinite rank A we obtain u "normal form" of A by finding a Bore1 set 62 such that A and 6! continuously reduce to each other. We do so by defining simple Bore1 operations which are homomorphic to the w, first Veblen ordinal operations of base (J, required

On Οƒ-porous sets and Borel sets
On Οƒ-porous sets and Borel sets
✍ LudΔ›k Zajíček πŸ“‚ Article πŸ“… 1989 πŸ› Elsevier Science 🌐 English βš– 277 KB
Borel on the Questions Versus Borel on t
Borel on the Questions Versus Borel on the Answers
✍ Heike Mildenberger πŸ“‚ Article πŸ“… 1999 πŸ› John Wiley and Sons 🌐 English βš– 433 KB

## Abstract We consider morphisms (also called Galois‐Tukey connections) between binary relations that are used in the theory of cardinal characteristics. In [8] we have shown that there are pairs of relations with no Borel morphism connecting them. The reason was a strong impact of the first of th