On an estimate for Bloch and Doob norm and covering problem in Doob's class |
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Authors: | JS Hwang |
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Institution: | Institute of Mathematics, Academic Sinica, Nankang, Taipei, Taiwan, Republic of China |
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Abstract: | For any fixed 0 < π ? 2π, let D(π) be the family of all holomorphic functions in the unit disk Δ which satisfy (i)f(0) = 0 and (ii) , for all π lying on some arc Af ? ?Δ with arclength . We show that for each 0 < ε < 1, there is a π0 > 0 such that for any f?D(π) with π < π0, the Bloch and Doob norm respectively satisfy These two estimates do not hold with ε = 0. |
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