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Published online by Cambridge University Press: 03 November 2016
page 301 note * denotes the positive square root of (b − a)2 as y varies from 0 to − ¼(b-a)2 and then back to 0. It is necessary to write the square root as and not as , since when y = 0 the first form gives us b-a which is positive, as it should be, while the second form gives us a - b which is negative.
page 302 note * We may consider M0 as – ∞ and Mn as + ∞.