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

Consider the straightening phi of a Beltrami form that is constant on asquare, with the corresponding ellipses having a vertical major axis, and nulloutside. A generalized Schwarz-Christoffel formula is used to express theinverse of phi. The formula is found by introducing an affine Riemann surface.This formula is used to draw on a computer the image of the square by phi, andpractical aspects are discussed. The resulting shapes are shown for differentvalues of the constant dilatation ratio of the ellipses (=major axis/minoraxis). The limit when this ratio tends to infinity is surprising. A model ofthis limit is proposed, produced by an affine surface uniformization.