Universal analytic preorders arising from surjective functions

• Autorzy: Riccardo Camerlo
• Języki publikacji: EN

Abstrakty

EN

Examples are presented of Σ₁¹-universal preorders arising by requiring the existence of particular surjective functions. These are: the relation of epimorphism between countable graphs; the relation of being a continuous image (or a continuous image of some specific kind) for continua; the relation of being continuous open image for dendrites.

Kategorie tematyczne

• 54F15: Continua and generalizations
• 03E15: Descriptive set theory

• Wydawca: Institute of Mathematics Polish Academy of Sciences
• Czasopismo: Fundamenta Mathematicae
• Rocznik: 2005
• Tom: 187
• Numer: 3
• Strony: 193-212

Daty

wydano

2005

Twórcy

autor

Riccardo Camerlo

• Dipartimento di Matematica, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy

Identyfikatory

DOI

10.4064/fm187-3-1