David's
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last
update:

15-05-2019


David E. Dirkse

Welcome at DavData, the website for:

board games, puzzles, math, freeware and Delphi programming

new
a chaotic pendulum
the Pied Piper of Hamelin the roots of climate activism
algebra problem (2)
Pythagorean triples
difficult geometric puzzles solved by rotation
difficult geometric problem solved numerically by Delphi program


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