A. Ioana

activity

20042008

most citedSubequivalence Relations and Positive-Definite Functions

9 citations · 19 across the 4 of their papers we have counts for

collaborators

4 papers

math.DS2008★ 9 cited

Subequivalence Relations and Positive-Definite Functions

A. Ioana, A. S. Kechris, T. Tsankov

We study a positive-definite function associated to a measure-preserving equivalence relation on a standard probability space and use it to measure quantitatively the proximity of…

math.GR2008★ 3 cited

Cocycle Superrigidity for Profinite Actions of Property (T) Groups

Adrian Ioana

Consider a free ergodic measure preserving profinite action $Γ ↷ X$ (i.e. an inverse limit of actions $Γ ↷ X_{n}$ , with $X_{n}$ finite) of a countable prope…

math.GR2007★ 7 cited

Orbit inequivalent actions for groups containing a copy of $F_{2}$

Adrian Ioana

We prove that if a countable group $Γ$ contains a copy of $F_{2}$ , then it admits uncountably many non orbit equivalent actions.

math.OA2004

A relative version of Connes' $χ (M)$ invariant and existence of orbit inequivalent actions

Adrian Ioana

We consider a new orbit equivalence invariant for measure-preserving actions of groups on the probability space, $σ : G \to$ Aut $(X, μ)$ , denoted $χ_{0} (σ; G)$ and defined as the "interse…

Subequivalence Relations and Positive-Definite Functions

Cocycle Superrigidity for Profinite Actions of Property (T) Groups

Orbit inequivalent actions for groups containing a copy of F2​

A relative version of Connes' χ(M) invariant and existence of orbit inequivalent actions

Orbit inequivalent actions for groups containing a copy of $F_{2}$

A relative version of Connes' $χ (M)$ invariant and existence of orbit inequivalent actions