Czechoslovak Mathematical Journal, Vol. 74, No. 3, pp. 869-880, 2024
On zero-symmetric nearrings with identity whose additive groups are simple
Wen-Fong Ke, Johannes H. Meyer, Günter F. Pilz, Gerhard Wendt
Received March 2, 2024. Published online July 24, 2024.
Abstract: We investigate conditions on an infinite simple group in order to construct a zero-symmetric nearring with identity on it. Using the Higman-Neumann-Neumann extensions and Clay's characterization, we obtain zero-symmetric nearrings with identity with the additive groups infinite simple groups. We also show that no zero-symmetric nearring with identity can have the symmetric group ${\rm Sym}(\mathbb{N})$ as its additive group.
Keywords: infinite simple group; HNN extension; nearring with identity
Affiliations: Wen-Fong Ke (correspponding author), Department of Mathematics, National Cheng Kung University, 1st, Dasyue Rd, East District, Tainan 701, Taiwan, e-mail: wfke@mail.ncku.edu.tw; Johannes H. Meyer, Department of Mathematics and Applied Mathematics, University of the Free State, PO Box 339, Bloemfontein, 9300, South Africa, e-mail: meyerjh@ufs.ac.za; Günter F. Pilz, Gerhard Wendt, Department of Algebra, Johannes Kepler Universität Linz, Altenberger Strasse 69, 4040 Linz, Austria, e-mail: guenter.pilz@jku.at, gerhard.wendt@gmx.at