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

The generating functions of divisor functions are quasimodular forms of weight 2 and their products belong to  a space  of quasimodular forms of higher weight. In this article, we evaluate the convolution sums∑   a  l  +  b  m  =  nl  σ  (  l  )  σ  (  m  )$$\begin{array}{} \displaystyle\sum\limits_{al+bm=n}\,l\sigma(l)\sigma(m) \end{array} $$

Evaluation of the convolution sums ∑ al + bm = n l σ ( l ) σ ( m ) with ab ≤ 9