Contents
Notes
102.06 A new elementary proof of Euler's continued fractions
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- 08 February 2018, pp. 105-111
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102.20 The sum of the first n cubes is a square – two Proofs without Words
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- 18 June 2018, p. 308
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102.38 A very elementary short proof of Conway's little theorem
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- 17 October 2018, pp. 496-497
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102.07 Evaluating the probability integral by approximating exp(−x2)
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- 08 February 2018, pp. 111-113
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102.39 Variants of Carmichael numbers and Cunningham chains
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- 17 October 2018, pp. 498-501
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102.21 An addendum to Estermann's proof of the irrationality of
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- 18 June 2018, pp. 308-309
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102.40 A nomogram for the solution of the equation
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- 17 October 2018, pp. 501-503
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102.22 Proof without Words: sums of sums of factorials is one less than a factorial: inductive step
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- 18 June 2018, pp. 309-310
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102.08 A method of evaluating ζ (2) and
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- 08 February 2018, pp. 114-121
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102.23 A visual proof that
is irrational
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- 18 June 2018, pp. 311-312
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is irrational
102.41 Proof without Words: sin2A+ sin2B+ sin2C = 4 sinAsinBsinC (where A + B + C = π)
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- 17 October 2018, p. 504
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102.09 Measurement of polygons and circles
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- 08 February 2018, pp. 121-127
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102.10 Pythagoras' theorem: a proof by contradiction
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- 08 February 2018, p. 128
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102.24 Area of a circle via the Fundamental Theorem of Calculus
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- 18 June 2018, pp. 312-314
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102.42 Proof without Words: An alternating geometrical series
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- 17 October 2018, pp. 504-505
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102.25 On an alternative formula for the area of a spherical cap
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- 18 June 2018, pp. 314-316
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102.11 Four congruent right triangles
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- 08 February 2018, pp. 129-131
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102.43 A comparative study of relative rates of change
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- 17 October 2018, pp. 505-511
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102.26 An ad hoc limiting process
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- 18 June 2018, p. 317
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102.12 On circles inscribed in an ellipse
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- 08 February 2018, pp. 131-132
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