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Demostracions sense paraules

16 publicacions de Claudi Alsina & Roger B. Nelsen

Another Pythagorean theorem

College Mathematics Journal, 53 (2022), p. 38

Means, Milne’s inequality, and quadrilateral area

Aequationes Mathematicae, 95 (2021), pp. 623-627

The Maclaurin inequality and rectangular boxes

Mathematics Magazine, 90 (2017), pp. 228-230

Proof without words: President Garfield and the Cauchy-Schwarz inequality

Mathematics Magazine, 88 (2015), pp. 144-145

5 Proof without words: Ptolemy’s inequality

Mathematics Magazine, 87 (2014), p. 291

Proof without words: The triple angle sine and cosine formulas

Mathematics Magazine, 85 (2012), p. 43.

Proof without words: The Pythagorean theorem with equilateral triangles

The College Mathematics Journal, 43 (2012), p. 226

Proof without words: Inequalities for two numbers whose sum is one

Mathematics Magazine, 84 (2011), p. 228

An invitation to proofs without words

European Journal of Pure and Applied Mathematics, 3 (2010), pp. 118-127

Teaching Tip: The limit of (sin t)/t

The College Mathematics Journal, 41 (2010), p. 192

Proof without words: New Pythagorean-like theorems

The College Mathematics Journal, 41 (2010), p. 370

Geometric proofs of the Weitzenböck and Hadwiger-Finsler inequalities

Mathematics Magazine, 81 (2008), pp. 216-219

Proof without words: Carnot's theorem for acute triangles

The College Mathematics Journal, 39 (2008), p. 111

A visual proof of the Erdös-Mordell inequality

Forum Geometricorum, 7 (2007), pp. 99-102

On Candido's identity

Mathematics Magazine, 80 (2007), pp. 226-228

On the diagonals of a cyclic quadrilateral

Forum Geometricorum, 7 (2007) pp. 147-149