“…Russell & Sun [24] recently showed, using a moment formula from Nabeya [18], that the reverse inequality in (1) is valid in dimension d = 2 when (α 1 , α 2 ) ∈ (−1, 0] × [0, ∞), thereby completing the study of the GPI conjecture in the bivariate case. In arbitrary dimension, Russell & Sun [25] also proved inequality (1) for all α 1 , .…”