On a problem of Hinkkanen about Hadamard products (Q919483)
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scientific article; zbMATH DE number 4161066
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | On a problem of Hinkkanen about Hadamard products |
scientific article; zbMATH DE number 4161066 |
Statements
On a problem of Hinkkanen about Hadamard products (English)
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1990
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The author in response to a conjecture by A. Hinkkanen proves that if two meromorphic functions f and g of hyper-order less than 2 satisfy the condition that \(f^{(n)}/g^{(n)}\) is entire and non-vanishing for \(0\leq n\leq 2\), then f/g reduces to a constant except for a few cases. These cases are characterized and f and g are explicitely given.
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