Esbelin, Henri-Alex; Gutan, Marin On the membership problem for some subgroups of \(\mathrm{SL}_2(\mathbb{Z})\). (English. French summary) Zbl 1515.20128 Ann. Math. Qué. 43, No. 2, 233-247 (2019). MSC: 20E05 20H05 11Y16 PDFBibTeX XMLCite \textit{H.-A. Esbelin} and \textit{M. Gutan}, Ann. Math. Qué. 43, No. 2, 233--247 (2019; Zbl 1515.20128) Full Text: DOI
Esbelin, Henri-Alex; Gutan, Marin Solving the membership problem for parabolic Möbius monoids. (English) Zbl 1467.20048 Semigroup Forum 98, No. 3, 556-570 (2019). MSC: 20M05 20M10 11B75 20G07 PDFBibTeX XMLCite \textit{H.-A. Esbelin} and \textit{M. Gutan}, Semigroup Forum 98, No. 3, 556--570 (2019; Zbl 1467.20048) Full Text: DOI