Construction of an Uncountable Difference between Φ(B) and Φf(B)
Josh Campbell ; David Swanson
Bulletin of the Polish Academy of Sciences. Mathematics, Tome 56 (2008), p. 121-130 / Harvested from The Polish Digital Mathematics Library
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We construct a set B and homeomorphism f where f and f-1 have property N such that the symmetric difference between the sets of density points and of f-density points of B is uncountable.

Publié le : 2008-01-01
EUDML-ID : urn:eudml:doc:281317 
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     author = {Josh Campbell and David Swanson},
     title = {Construction of an Uncountable Difference between $\Phi$(B) and $$\Phi$\_f(B)$
            },
     journal = {Bulletin of the Polish Academy of Sciences. Mathematics},
     volume = {56},
     year = {2008},
     pages = {121-130},
     zbl = {1151.28300},
     language = {en},
     url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-ba56-2-4}
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Josh Campbell; David Swanson. Construction of an Uncountable Difference between Φ(B) and $Φ_f(B)$
            . Bulletin of the Polish Academy of Sciences. Mathematics, Tome 56 (2008) pp. 121-130. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-ba56-2-4/