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

For any given positive integer $l$, we prove that every plane deformation ofa circle which preserves the $1/2$ and $1/(2l+1)$-rational caustics is triviali.e. the deformation consists only of similarities (rescalings plusisometries).

Non co-preservation of the $1/2$ & $1/(2l+1)$-rational caustics along deformations of circles