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 Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In this paper, we show that biharmonic hypersurfaces with at most two distinct principal curvatures in pseudo-Riemannian space form Nn+1 s ðcÞ with constant sectional curvature c and index s have constant mean curvature. Furthermore, we find that such biharmonic hypersurfaces M2k−1 r in even-dimensional pseudo-Euclidean space E 2k s , M 2k−1 s−1 in even-dimensional de Sitter space S2k s ðcÞðc > 0Þ, and M2k−1 s in even-dimensional anti-de Sitter space H2k s ðcÞðc < 0Þ are minimal.

Biharmonic Hypersurfaces in Pseudo-Riemannian Space Forms with at Most Two Distinct Principal Curvatures