2 citations · 7 across the 15 of their papers we have counts for
Showing 2011Show all
2 papers · 1 filter
math.LO2011
On surjectively universal Polish groups
Longyun Ding
A Polish group is surjectively universal if it can be continuously homomorphically mapped onto every Polish group. Making use of a type of new metrics on free groups \cite{DG}, we…
math.LO2011
Borel equivalence relations between \ell_1 and \ell_p
Longyun Ding, Zhi Yin
In this paper, we show that, for each , there are continuum many Borel equivalence relations between and ordered by which are pairw…