Asger Tornquist

activity

20072025

most citedOrbit Equivalence and actions of F_n

27 citations · 37 across the 13 of their papers we have counts for

collaborators

Showing 2015Show all

2 papers · 1 filter

math.LO2015★ 3 cited

Definable maximal discrete sets in forcing extensions

David Schrittesser, Asger Törnquist

Let $R$ be a $Σ_{1}^{1}$ binary relation, and recall that a set $A$ is $R$ -discrete if no two elements of $A$ are related by $R$ . We show that in the Sacks a…

math.LO2015

Definability and almost disjoint families

Asger Tornquist

We show that there are no infinite maximal almost disjoint ("mad") families in Solovay's model, thus solving a long-standing problem posed by A.D.R. Mathias in 1967. We also give a…