We show that, given a semitopological group G, the semitopological groups Ti (G∙) and (Ti (G) ) ·, for each i ∈ 0, 1, 2, and (Gsr) · and (G·) sr, are topologically isomorphic. Moreover, we prove that, given a paratopological group G, the paratopological groups Reg (G·) and (Reg (G) ) · are topologically isomorphic.
Boris Reyes (2026) studied this question.