Exceptional values of solutions of linear differential equations (Q583442)
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scientific article; zbMATH DE number 4132577
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Exceptional values of solutions of linear differential equations |
scientific article; zbMATH DE number 4132577 |
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Exceptional values of solutions of linear differential equations (English)
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1989
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For a differential equation \(w^{(n)}+p_{n-1}(z)w^{(n-1)}+...p_ 0(z)w=0\) with polynomial coefficients the author investigates the density of zeros of individual solutions, the density of zeros of the fundamental set of solutions and the distribution of zeros of the solutions. In particular, it is proved that the total number of zeros in some large disc \(| z| <r\) but outside the ``logarithmic strips'' \(| \arg z-\theta | <C \log^+| z| /| z|^{1/p}\) around the Stokes rays arg z\(=\theta\) is of order O(log r).
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density of zeros
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distribution of zeros
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logarithmic strips
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Stokes rays
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