applications of subordination theory to starlike functions
نویسندگان
چکیده
let $p$ be an analytic function defined on the open unit disc $mathbb{d}$ with $p(0)=1.$ the conditions on $alpha$ and $beta$ are derived for $p(z)$ to be subordinate to $1+4z/3+2z^{2}/3=:varphi_{c}(z)$ when $(1-alpha)p(z)+alpha p^{2}(z)+beta zp'(z)/p(z)$ is subordinate to $e^{z}$. similar problems were investigated for $p(z)$ to lie in a region bounded by lemniscate of bernoulli $|w^{2}-1|=1$ when the functions $(1-alpha)p(z)+alpha p^{2}(z)+beta zp'(z)$ , $(1-alpha)p(z)+alpha p^{2}(z)+beta zp'(z)/p(z)$ or $p(z)+beta zp'(z)/p^{2}(z)$ is subordinate to $varphi_{c}(z)$. related results for $p$ to be in the parabolic region bounded by the $re w=|w-1|$ are investigated.
منابع مشابه
Applications of subordination theory to starlike functions
Let $p$ be an analytic function defined on the open unit disc $mathbb{D}$ with $p(0)=1.$ The conditions on $alpha$ and $beta$ are derived for $p(z)$ to be subordinate to $1+4z/3+2z^{2}/3=:varphi_{C}(z)$ when $(1-alpha)p(z)+alpha p^{2}(z)+beta zp'(z)/p(z)$ is subordinate to $e^{z}$. Similar problems were investigated for $p(z)$ to lie in a region bounded by lemniscate of Bernoulli $|w^{2}-1|=1$ ...
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bulletin of the iranian mathematical societyجلد ۴۲، شماره ۳، صفحات ۷۶۱-۷۷۷
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