Higher monotonicity properties of certain Sturm-Liouville functions. V

Higher monotonicity properties of certain Sturm-Liouville functions. V
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某些 Sturm-Liouville 函数具有更高的单调性。

DOI:
10.1017/s0308210500018011
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发表时间:
1977
期刊:
Proceedings of the Royal Society of Edinburgh: Section A Mathematics
影响因子:
--
通讯作者:
E. Pavlikova
E. Pavlikova
中科院分区:
--
文献类型:
--
作者:
E. Pavlikova

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这里主要关心的是f或方程的特解的条件,这些条件确保(1)的解的零点和相关量的较高差在符号上是正则的。特别地,通过选择f(x)= 2 v − 2x 1/v−2,表明如果伪随机|v| <½,则其中cvk表示v阶贝塞尔函数的第k个正零点,Δµk = Δk+1 − µk。Lorch和Szego [15]指出,(2)应适用于较大范围|v| <1/2,但这里使用的方法不适用于范围|v <|pseudo。
Synopsis The principal concern here is with conditions on f or on special solutions of the equation which ensure that the higher differences of the zeros and related quantities of solutions of (1) are regular in sign. In particular, by choosing f(x)= 2v−2x1/v−2, it is shown that if ⅓ ≦|v|<½, then where cvk denotes the kth positive zero of a Bessel function of order v and Δµk = Δk+1 − µk. Lorch and Szego [15] conjectured that (2) should hold for the larger range | v | < ½ but the methods used here do not apply to the range | v <| ⅓.