## Functiones et Approximatio Commentarii Mathematici

Functiones et Approximatio, Commentarii Mathematici is a mathematical journal edited by the Faculty of Mathematics and Computer Science of Adam Mickiewicz University since 1974. The journal publishes original papers in mathematics, with special attention to analysis (in a broad sense) and number theory.

Advance publication of articles online is available.

Bilateral $q$-series identities and reciprocal formulaeVolume 42, Number 2 (2010)
The $3x+1$ problem: a lower bound hypothesisVolume 56, Number 1 (2017)