Published online by Cambridge University Press: 20 October 2023
We prove that any subset of $\overline {\mathbb {Q}}^m$ (closed under complex conjugation and which contains the origin) is the exceptional set of uncountably many transcendental entire functions over
$\mathbb {C}^m$ with rational coefficients. This result solves a several variables version of a question posed by Mahler for transcendental entire functions [Lectures on Transcendental Numbers, Lecture Notes in Mathematics, 546 (Springer-Verlag, Berlin, 1976)].
Diego Marques was supported by CNPq-Brazil. Pavel Trojovský was supported by the Project of Excellence, Faculty of Science, University of Hradec Králové, No. 2210/2023-2024.