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

In this note, we investigate the Fekete-Szegö problem for a class    of functions  f  analytic in the open unit disc Δ = {z: |z| &lt; 1} (and which is related to a shell-like curve associated with Fibonacci numbers) satisfying the conditions thatf  (  0  )  =  0  ,       f  ′   (  0  )  =  1      and        z   f  ′   (  z  )    f  (  z  )    ≺    1  +   τ  2    z  21  −  τ  z  −   τ  2    z  2   (  z  ∈  Δ  )  ,    $$f(0) = 0,\qquad f'(0) = 1\qquad {\text{and}}\qquad \frac{{zf'(z)}}{{f(z)}} \prec \frac{{1 + {\tau ^2}{z^2}}}{{1 - \tau z - {\tau ^2}{z^2}}}\quad (z \in \Delta ),$$

Fekete–Szegö problem for some starlike functions related to shell-like curves