Hankel determinants for starlike and convex functions associated with sigmoid functions
Amina Riaz, Mohsan Raza, Derek K. Thomas
Abstract
Abstract This paper is concerned with Hankel determinants for starlike and convex functions related to modified sigmoid functions. Sharp bounds are given for second and third Hankel determinants.
Topics & Concepts
Sigmoid functionMathematicsRegular polygonConvex functionConvex analysisSubderivativePure mathematicsConvex optimizationArtificial intelligenceComputer scienceGeometryArtificial neural networkAnalytic and geometric function theoryHolomorphic and Operator Theory