Abstract
SynopsisThe inequality, for suitable sets of non-negative numbers x1, x2, …, xn,is undecided in the cases n = 11, 12, 13, 15, 17, 19, 21 and 23. In this note we present the results of numerical analysis supporting the conjecture that the inequality is valid in these cases. A new counter–example for n = 25 and a new elementary proof when n = 7 are given.
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