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Sharp bounds on Hankel and Hermitian–Toeplitz determinants of associated Sakaguchi functions

  • Sushil Kumar,
  • Rakesh Kumar Pandey,
  • Pratima Rai

摘要

In this paper, we determine sharp bounds on some Hankel determinants involving initial coefficients, inverse coefficients, and logarithmic inverse coefficients for two associated subclasses of Sakaguchi functions related to the lemniscate of Bernoulli and exponential function. Further, we compute sharp bounds on the second-order Hermitian–Toeplitz determinants involving logarithmic coefficients and logarithmic inverse coefficients for such subclasses. We also discuss the invariance property for the obtained estimates with respect to various coefficients.