Obituary
Sir Michael Francis Atiyah, O.M., 22 April 1929 – 11 January 2019

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 06 June 2019, pp. 193195

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Margaret E Rayner 21st August 1929 – 31st May 2019

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 21 October 2019, pp. 385387

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Other
Index to Volume 103 Issue 556558

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 02 March 2020, pp. iviii

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Articles
More variations on the SteinerLehmus theme

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 14 February 2019, pp. 111

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Historical mathematical problems suitable for classroom activities

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 14 February 2019, pp. 1219

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Alice’s adventures in inverse tan land – mathematical argument, language and proof

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 21 October 2019, pp. 388400

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Locating parameters of interest in a conic section

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 06 June 2019, pp. 196203

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New proofs of certain characterisations of cyclic circumscriptible quadrilaterals

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 21 October 2019, pp. 401408

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Area formulas for certain convex quadrilaterals

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 14 February 2019, pp. 2027

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Teaching proofs without words using dynamic geometry

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 06 June 2019, pp. 204211

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Coincidence of the barycentre and the geometric centre of weighted points

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 21 October 2019, pp. 409415

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A hyperbolic proportionality theorem and hyperbolic surveying problems

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 06 June 2019, pp. 212221

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Conics and a generalised conical pendulum

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 14 February 2019, pp. 2840

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Characterisations of the parabola

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 21 October 2019, pp. 416430

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The prescient power of indifference

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 14 February 2019, pp. 4146

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New points that belong to the ninepoint circle

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 06 June 2019, pp. 222232

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The Chinese Ring puzzle, the Crazy Elephant Dance puzzle, the bSpinout puzzle, and Gray codes

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 21 October 2019, pp. 431441

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Pascalpoints quadrilaterals inscribed in a cyclic quadrilateral

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 06 June 2019, pp. 233239

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An appraisal of Lalanne's nomogram

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 14 February 2019, pp. 4751

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The morphology of ${\mathbb{Z}}\sqrt {{\rm{[10]}}} $

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 21 October 2019, pp. 442460

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