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

It is known that the maximal order of a cyclic group of automorphisms admitted by a Klein surface or real algebraic curve of algebraic genus p is 2p or 2(p + 1), depending on whether p is odd or even. In this paper, we classify the automorphism groups of all non-orientable Klein surfaces, without boundary, which admit an automorphism group of order 2p, or 2(p + 1). We determine that the automorphism groups are cyclic precisely when the surfaces are hyperelliptic. Defining equations for all but one family of these Klein surfaces are given.

On non-orientable Riemann surfaces with 2p or 2p + 2 automorphisms