Schwarzian derivatives and zeros of solutions to second order linear differential equations

Authors:
A. Hinkkanen and John Rossi

Journal:
Proc. Amer. Math. Soc. **113** (1991), 741-746

MSC:
Primary 34C10; Secondary 30D05, 34A20

DOI:
https://doi.org/10.1090/S0002-9939-1991-1069689-5

MathSciNet review:
1069689

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Abstract: Let be entire. Suppose that there exists an unbounded quasidisk such that is sufficiently small in . We prove that then any nontrivial solution to has at most one zero in . We show that if where and are polynomials, one can usually take to be an angle of opening where is the degree of .

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DOI:
https://doi.org/10.1090/S0002-9939-1991-1069689-5

Article copyright:
© Copyright 1991
American Mathematical Society