Neville Holmes
pág. 7
German history experienced: My studies, my teachers.: My studies, my teachers.
Horst Tietz
pág. 12
Colin Adams
pág. 21
Total positivity: Tests and parametrizations.: Tests and parametrizations.
Sergey Fomin, Andrei Zelevinsky
pág. 23
Exact thought in a demented time: Karl Menger and his Viennese Mathematical Colloquium.: Karl Menger and his Viennese Mathematical Colloquium.
Karl Sigmund, Louise Golland
pág. 34
The planiverse project: Then and now.: Then and now.
A.k. Dewdney
pág. 46
Alphabetic magic square in a medieval church.
Aldo Domenicano, Istvan Hargittai
pág. 52
A fourfold point of concurrence lying on the Euler line of a triangle.
Michael Longuet-Higgins
pág. 54
pág. 60
Marion Cohen, Jet Wimp
pág. 70
Florence Fasanelli, Robin Wilson
pág. 80
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