Homogeneous models and generic extensions.
In this paper some infinitely based varieties of groups are constructed and these results are transferred to the associative algebras (or Lie algebras) over an infinite field of an arbitrary positive characteristic.
In this paper we deal with the class of groups for which whenever we choose two infinite subsets , there exist two elements , such that . We prove that an infinite finitely generated soluble group in the class is in the class of -Engel groups. Furthermore, with , we show that if is infinite locally soluble or hyperabelian group then .
T. Kepka, M.K. Kinyon and J.D. Phillips: The structure of F-quasigroups, J. Algebra 317 (2007), no. 2, 435–461 developed a connection between F-quasigroups and NK-loops. Since NK-loops are contained in the variety generated by groups and commutative Moufang loops, a question that arises is whether or not there exists a nonsplit NK-loop and likewise a nonsplit F-quasigroup. Here we prove that there do indeed exist nonsplit F-quasigroups and show that there are exactly four corresponding nonsplit...