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Issue 1
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Front matter
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Article: Intriguing infinite words composed of zeros and ones
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1
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Article: Dreiecke, Teildreiecke und Kreise
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9
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Article: Is the spiral effect psychological?
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21
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Article: Wolstenholme's theorem revisited
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35
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Article: An inequality for the ratio of polynomials
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37
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Article: Angle sum of polygons in space
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41
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Rubric: Aufgaben
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44
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Back matter
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Issue 2
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Front matter
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Article: Cycles cross ratio : an invitation
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49
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Article: Isogonal cevians and inequalities for quotients of cevians
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62
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Article: Unit squares with unit line segments
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68
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Article: Unlikely leading digits of powers of 2
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77
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Article: The Garfunkel-Bankoff inequality and the Finsler-Hadwiger inequality
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82
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Rubric: Aufgaben
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85
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Book review: Rezensionen
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90
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Back matter
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Issue 3
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Front matter
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Article: Another extension of Lobachevsky's formula
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93
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Article: Regression ellipses via hyperbolic geometry
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101
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Article: Approximation of polynomials by Hermite interpolation
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113
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Article: Isosceles tetrahedrons with integer edges and volume in the Z x Z x Z grid
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123
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Article: A remark on an identity involving products of binomial coefficients
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127
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Article: A simple proof of the Fundamental Theorem of Algebra
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131
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Book review: Rezensionen
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133
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Rubric: Aufgaben
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135
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Back matter
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Issue 4
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Front matter
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Article: Daniel Bernoulli's "immensly fertile equation" : notes on relations between a nonlinear and a linear second order equation
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141
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Article: Die Infizierung des Z²
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155
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Article: The equation x/y + y/z + z/x = 4 revisited
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168
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Article: Hermite's identity and the quadratic reciprocity law
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171
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Article: Two proofs of Bondy's theorem on induced subsets and two related questions
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174
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Book review: Rezensionen
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178
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Rubric: Aufgaben
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180
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Back matter
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