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

Let $\Gamma$ be a Schottky subgroup of $\mathrm{SL} (2,\mathbb{Z})$. Weestablish a uniform and explicit lower bound of the second eigenvalue of theLaplace-Beltrami operator of congruence coverings of the hyperbolic surface$\Gamma \backslash \mathbb{H}^2$ provided the limit set of $\Gamma$ is thickenough.

Explicit spectral gap for Schottky subgroups of $\mathrm{SL} (2,\mathbb{Z})$