“…Ideal convergence was introduced in [42], though a primitive version of [41] is also included in the references of [42], and independently in [49] under the name of "cofilter convergence", and was recently developed and investigated in several papers in the context of normed and/or metric spaces. Among the related literature, we quote [4,5,8,9,22,30,31,35,38,41,50,53,54,55]. This concept has been studied also in topological spaces ( [28,29,43,44]) and ( )-groups ( [7,11,12,13,14,15,16,17,18,19,20,23,24]).…”