3D-Mathematics - Thank you

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Thank you!

The author thanks:

SketchUp developers and the various plugin developers
… for the fabulous 3D software - now from Trimble

Takuji Hatakawa
… for the export function for SketchUp models into the html5/WebGL format

Olaf Schreiber Softwareentwicklung und Consulting
… for the friendship service of website development

Prof. em. Dr. Dierck-E. Liebscher
… for his support in my studies of mathematics and cosmology

… for the incredible number of things I have known and learned

… who have created wonderful things

and hundreds more
… who have shared their knowledge with me