@Article{Kalinowski2007,
author = "Kalinowski, Józef",
title = "On the equivalence of pre-Schröder equations",
journal = "Opuscula Math.",
year = "2007",
volume = "27",
number = "2",
pages = "253--257",
doi = "http://dx.doi.org/10.7494/OpMath.2007.27.2.253",
url = "http://dx.doi.org/10.7494/OpMath.2007.27.2.253",
abstract = "In the paper the equivalence of the system of two pre-Schröder functional equations (equations \((S_n)\), \((S_m)\) for \(m \gt n \geq 3\), \(n, m \in \mathbb{N}\)) and the whole system \((S)\), is considered. The results solve the problem of Gy. Targonski [Gy. Targonski, Problem P 63, Aequationes Math. 4 (1970), 251] in a particular case.",
keywords = "pre-Schröder equations, Targonski's problem, torsion free semigroups",
issn = "1232-9274"
}