-pure-high subgroups of abelian groups
We prove that if is an Abelian -group of length not exceeding and is its -projective subgroup for such that is countable, then is also -projective. This enlarges results of ours in (Arch. Math. (Brno), 2005, 2006 and 2007) as well as a classical result due to Wallace (J. Algebra, 1971).