“…One of the weights was introduced by Oleinik [23] in 1978, denoted by OP, which has later been studied in [4,8,9,13,26,27]. Another class of weight was introduced by Borichev, Dhuez and Kellay [5] in 2007, denoted by BDK, which has later been considered in [1,3,4,21,22]. As stated in [17], the weight W 0 covers BDK, but there is no inclusion relation between the weight W 0 and OP.…”