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Issue 1
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Front matter
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Table of Contents
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Article
Relationship between the evolutionary development of a virus and logistic growth
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1
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Article
Ein elementarer Beweis des Primzahlsatzes via den ersten Satz von Mertens
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11
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Article
A graph called Harmony
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26
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Article
Eine besondere Lage dreier Kegelschnitte bei speziellen Sechsecken
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32
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Rubric
Aufgaben
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38
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Book review
Rezensionen
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43
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Back matter
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Issue 2
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Front matter
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Table of Contents
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Article
Zero-free regions for lacunary polynomials with positive coefficients
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45
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Article
Six primes in generalized Fermat numbers
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59
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Article
How many stones can we place in empty baskets?
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66
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Article
A synthetic proof of the Morley trisector theorem using congruent and similar triangles
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70
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Article
Jacobsthal analogues of two Fibonacci-Lucas identities and a generalization
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73
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Article
An extension of the Kantorovich inequality to Hilbert spaces
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78
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Rubric
Aufgaben
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84
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Back matter
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Issue 3
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Front matter
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Article
Chapple porism : a visual spell
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89
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Article
Polynomial Cauchy functional equations : a report
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97
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Article
Schanuel's conjecture and the roots of elementary functions
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109
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Article
A short proof of a variant of the round-robin scheduling problem
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120
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Article
On an Erdős inscribed triangle inequality revisited
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123
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Article
Trirectangular equable tetrahedra with integer face areas
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128
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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
Inequalities about the area bounded by three cevian lines of a triangle
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137
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Article
Manchmal dauert es länger : Saly Ruth Struiks Artikel in "Elemente der Mathematik"
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149
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Article
Generalizations of the Gandhi formula for prime numbers
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166
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Article
On the equation x/y+y/z+z/x=4m
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170
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Rubric
Aufgaben
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175
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Back matter
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