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Apr 4, 2022 at 22:03 history edited Steven Clark CC BY-SA 4.0
Added formulas (12) and (14) which are slightly simpler but believed to be exactly equivalent representations of u'(x) and delta(x).
Mar 20, 2022 at 2:25 history edited Steven Clark CC BY-SA 4.0
Added missing summation to the second equality of formula (10).
Mar 19, 2022 at 19:24 history edited Steven Clark CC BY-SA 4.0
Added another link which provides additional background information.
Mar 19, 2022 at 18:50 vote accept Steven Clark
Mar 19, 2022 at 18:49 history answered Steven Clark CC BY-SA 4.0