Brydak, Dobiesław; Choczewski, Bogdan A functional inequality related to Böttcher’s equation. (English) Zbl 1210.39019 Rocz. Nauk.-Dydakt., Pr. Mat. 17, 75-82 (2000). MSC: 39B12 Iteration theory, iterative and composite equations 39B62 Functional inequalities, including subadditivity, convexity, etc. PDFBibTeX XMLCite \textit{D. Brydak} and \textit{B. Choczewski}, Rocz. Nauk.-Dydakt., Pr. Mat. 17, 75--82 (2000; Zbl 1210.39019)