Orienting Borel graphs
Orienting Borel graphs
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定向 Borel 图
DOI:
10.1090/proc/15742
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发表时间:
2022
影响因子:
1
通讯作者:
Thornton, Riley
中科院分区:
文献类型:
--
作者:
Thornton, Riley
We investigate when a Borel graph admits a (Borel or measurable) orientation with outdegree bounded byfor various cardinals. We show that for a probability measure preserving (pmp) graph, a measurable orientation can be found whenis larger than the normalized cost of the restriction ofto any positive measure subset. Using an idea of Conley and Tamuz, we can also find Borel orientations of graphs with subexponential growth; however, for everywe also find graphs which admit measurable orientations with outdegree bounded bybut no such Borel orientations. Finally, for special values ofwe bound the projective complexity of Borel-orientability for graphs and graphings of equivalence relations. It follows from these bounds that the set of equivalence relations admitting a Borel selector isin the codes, in stark contrast to the case of smooth relations. References
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影响因子:
3.9
作者:
G. Hjorth
通讯作者:
G. Hjorth
影响因子:
1.8
作者:
Conley, Clinton T.;Tamuz, Omer
通讯作者:
Tamuz, Omer
影响因子:
1.8
作者:
G. Elek;Gábor Lippner
通讯作者:
Gábor Lippner
影响因子:
1
作者:
Francis Adams;J. Zapletal
通讯作者:
J. Zapletal
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
Andrew S. Marks
通讯作者:
Andrew S. Marks