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

We establish a sharp inequality between the blocks of positive partitionedmatrices and conjecture a triangle type inequality for contractions: Giventhree contactions A,B,C, we conjecture that the constant c=3/4 is sharp in thetriangle inequality |A+B+C| < cI + |A| +|B| + |C|.

Diagonal and off-diagonal blocks of positive definite partitioned matrices