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/

Zendy Plus

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

Zendy Tools

Zendy Open

We show that under certain conditions every maximal symmetric subfield of acentral division algebra with positive unitary involution $(B,\tau)$ will be aGalois extension of the fixed field of $\tau$ and will "real split" $(B,\tau)$.As an application we show that a sufficient condition for the existence ofpositive involutions on certain crossed product division algebras, consideredby Berhuy in the context of unitary space-time coding, is also necessary,proving that Berhuy's construction is optimal.

Galois extensions, positive involutions and an application to unitary space-time coding