“…on (0, 1) was proved (see [3]). More of such examples can be seen in [4], [5], [6], [7,Lemma 2.14], [8], [9], [10,Lemma 3.5], [11], [12]. Fortunately, several properties of R (a, 1 − a), B (a, 1 − a) and their combinations have been discovered, which can be summarized as the following three aspects:…”