Universal analytic preorders arising from surjective functions
Riccardo Camerlo
Fundamenta Mathematicae, Tome 185 (2005), p. 193-212 / Harvested from The Polish Digital Mathematics Library

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.

Publié le : 2005-01-01
EUDML-ID : urn:eudml:doc:282812
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     title = {Universal analytic preorders arising from surjective functions},
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     volume = {185},
     year = {2005},
     pages = {193-212},
     zbl = {1096.03059},
     language = {en},
     url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-fm187-3-1}
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Riccardo Camerlo. Universal analytic preorders arising from surjective functions. Fundamenta Mathematicae, Tome 185 (2005) pp. 193-212. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-fm187-3-1/