Some extremal problems in $L^p(w)$
Some extremal problems in $L^p(w)$
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$L^p(w)$ 中的一些极值问题
DOI:
10.1090/s0002-9939-98-04275-0
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发表时间:
1998
期刊:
影响因子:
--
通讯作者:
M. Pourahmadi
中科院分区:
文献类型:
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作者:
R. Cheng;A. Miamee;M. Pourahmadi
Fix a positive integerand. We provide expressions for the weighteddistancewhereis normalized Lebesgue measure on the unit circle,is a nonnegative integrable function, andranges over the trigonometric polynomials with frequencies inorThese distances are related to other extremal problems, and are shown to be positive if and only ifis integrable. In some cases they are expressed in terms of the series coefficients of the outer functions associated with. References