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} assuming that the Taylor coefficients of the function log(zf′(z)/f(z)) at zero are nonnegative. We also

of coefficients for functions with restrictions on the pre-Schwarzian derivative. We obtain an estimate, which

In this paper we show that there exists a function f bounded and univalent in the unit disk

of closed and univalent mappings.

In this paper we give an example of two convex functions in | ζ| > 1 whose arithmetic mean

functions in the region |ζ|>-1 and in the disk |ζ|<-1. We examine the question of univalent variation

In this talk, we are interested to explore more on locally univalent harmonic functions

of the integral means of the derivative of an analytic function. Also, we establish that this constant is equal

at the infinity and generalize univalent convex functions defined in the exterior of the unit disc. We prove sharp

of closed and univalent mappings.

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