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

Ricci flow spacetimes were introduced by Kleiner & Lott as a way to describeRicci flow through singularities, and have since been used elsewhere in theliterature, prompting the question of their rigidity. In $(2+1)$-dimensions, weshow that every complete and sufficiently regular spacetime must be acylindrical spacetime. That is, if the metric is complete on each spatialslice, after imposing a necessary continuity condition, we can conclude thatevery spatial slice must be diffeomorphic to a fixed surface, and the Ricciflow spacetime is isometric to a classical Ricci flow on this surface.

Complete $(2+1)$-dimensional Ricci flow spacetimes