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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Izhboldin and Karpenko proved in 2000 that any quadratic form of dimension 8with trivial discriminant and Clifford algebra of index 4 is isometric to thetransfer, with respect to some quadratic \'etale extension, of a quadratic formsimilar to a 2-fold Pfister form. We give a new proof of this result, based ona theorem of decomposability for degree 8 and index 4 algebras with orthogonalinvolution.

Quadratic forms of dimension 8 with trivial discrimiand and Clifford algebra of index 4