On the utility of Robinson-Amitsur ultrafilters. II
arXiv:1508.07496 · doi:10.1016/j.jalgebra.2016.07.023
Abstract
We extend the result of arXiv:0911.5414 about embedding of ideal-determined algebraic systems into ultraproducts, to arbitrary algebraic systems, and to ultraproducts over -complete ultrafilters. We also discuss the scope of applicability of this result, and correct a mistake from the previous paper concerning homomorphisms from ultraproducts.
5 pages; v3: minor corrections; to appear in J. Algebra