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

P. Volkmann functional inequality |f (x + y)| ≥ |f (x) + f (y)| is extended to functions f : G → F (X, E) where G is an additive group and F (X, E) is the space of functions from a set X to a linear normed space E. As a corollary one proves that an operator T : C (X, K) → C (X, K) which satisfies the functional inequality |T (f + g)| ≥ |T (f) + T (g)| , f, g ∈ C (X, K) is additive. Here we denoted by X a compact topological space, K is R or C and C (X, K) is the linear space of continuous functions defined on X with values in K.

On the Maksa-Volkmann functional inequality |f (x + y)| ≥ |f (x) + f (y)| when the range of f is a space of functions