English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We introduce two families of examples of groups acting on trees, oneconsisting of group amalgamations and the other consisting of HNN-extensions,motivated by the problems of $C^*$-simplicity and unique trace property.Moreover, we prove that our examples are not inner amenable and identify arelatively large, simple, normal subgroup in each one.

Two Families of Examples of Groups Acting on Trees with Nontrivial Quasi-Kernels