Sharp bounds are obtained for the second and third Hankel determinants of the starlike MA-Minda class S*(φ) defined by subordination to the quadratic 1 + z + (m/n)z² with 2m ≤ n.
Janowski , Extremal problems for a family of functions with positive real part and for some related families, Ann
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Sharp second and third Hankel determinants are obtained for the class C(φ) where φ(z) = (1 + z/2)^2.
Sharp second and third Hankel determinants are obtained for the class S*((1 + z/2)^2) along with the extremal functions achieving the bounds.
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The second and third Hankel determinants for starlike MA--Minda subclass associated to quadratic polynomials
Sharp bounds are obtained for the second and third Hankel determinants of the starlike MA-Minda class S*(φ) defined by subordination to the quadratic 1 + z + (m/n)z² with 2m ≤ n.
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The second and third Hankel determinants for certain convex subclass of functions
Sharp second and third Hankel determinants are obtained for the class C(φ) where φ(z) = (1 + z/2)^2.
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The second and third Hankel determinants for certain classes of functions
Sharp second and third Hankel determinants are obtained for the class S*((1 + z/2)^2) along with the extremal functions achieving the bounds.