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Issue 1
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Front matter
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Article
A colouring problem for the dodecahedral graph
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1
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Article
Special orthagonal integer bases and representations by sums of squares
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10
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Article
Lügner und die Gruppe (Z₂)n
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17
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Article
Infinitude of primes: Euclid‘s proof using angles between lattice vectors
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28
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Article
Maclaurin series integration
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33
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Article
A proof of the fundamental theorem of algebra using Hurwitz‘s theorem
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38
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Rubric
Aufgaben
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40
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Back matter
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Issue 2
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Front matter
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Article
On the maximum area of inscribed polygons
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45
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Article
On the symmetry of finite sums of exponentials
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62
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Article
A short synthetic proof of Thébault's theorem
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74
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Article
Mollweide's formula and circumcevians of the incenter
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78
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Rubric
Aufgaben
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82
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Book review
Rezensionen
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87
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Back matter
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Issue 3
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Front matter
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Article
A natural construction for the real numbers
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89
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Article
Two remarkable triangles of a triangle and their circumcircles
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106
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Article
A matrix viewpoint for various algebraic extensions
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115
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Rubric
Aufgaben
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132
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Back matter
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Issue 4
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Front matter
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Article
Symmedian and isodynamic points relations
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137
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Article
Holes in lace doilies : the geometric kernel of circulant graphs
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154
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Article
Schröder's processes and the best ways of increasing order of Newton's method
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165
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Article
Factorization of Delannoy matrices
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178
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Rubric
Aufgaben
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182
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Book review
Rezensionen
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186
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Table of Contents
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Back matter
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