On a problem of Hinkkanen about Hadamard products
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.
scientific article; zbMATH DE number 4161066