Baumann Eduard, Fribourg, Switzerland
Intersections
of cylinders (english)
Intersections de cylindres (fran ais)
Schnitte von Zylindern (deutsch)
3D printings available !
3D
Updated / mise jour / nachgef hrt : 1.1.2025
Split polygons in equal area pieces with minimal cutting length. 2009 update.
What is the maximum volume for a not strechable
cushion which can be flattened to a square? Click on the cushion!
Convex polyhedra with equal length edges.
(2021) Indem man bei NearMissPolyedern die Winkel in den n-Ecken, n>3, freigibt, kann man Gleichkanter gewinnen. So geschehen bei den Johnson NearMisses.
(2014) Gleichfl cher. Convex polyhedra with equal area faces. Click the picture.
HECTOHEDRA
On this page I showed aready collected equal edge length polyhedra and also equal area face polyhedra. Now I collected the convex polyhedra with exactly 100 faces. The collection with 131 elements is certainly not complet but shows an interesting variety of forms. We have also a special class with 50 elements where the edgelengthes are equal. The elements are ordered by roundness (surface area if volume is one). People which are interested in the coordinates of these polyhedra can download the zipped stel-files for the program GreatStella. Today may 2017 both roundest cases are beaten and known to me.
81 hectohedra roundness pictures
50 equaledge hectohedra roundness pictures
50 equaledge hectohedra roundness table
Roundest equilateral polyhedra for given number of faces less or equal 122
Nicht unendliche viele sondern nur eine gegebene Anzahl einheitlich grosser Kugeln m glichst eng packen, ist ein interessantes Thema. Siehe dazu
How big can a n-polygon be if it must be covered by m n-polygons
of side 1? Click on the sketch!
NobleSnub, ein ganz besonderer Vielfl chner
Wahrscheinlichkeiten
beim Kartenspiel
See also:
Ich wandere gern (hiking, randonn ), siehe:
http://www.hikr.org/user/BaumannEdu/tour/
Site for programming contests:
I'm a fan of 4D cubing:
http://www.superliminal.com/cube/cube.htm
Splitting a cube in
tetrahedras Counting
2-colored dodecahedra Counting facepairings on platonic polyhedra Beyond the 21 cylinder intersection Counting stamp foldings / Anzahl Briefmarkenfaltungen Human knots / Menschliche Knoten
Try LaserTank, a Sokoban like programm ! http://en.wikipedia.org/wiki/Lasertank http://perso.cgocable.ca/lasertank/index.html Here you can get some freeware from my son
Keywords: cylinder Zylinder
cylindre intersection Schnitt Dodekaeder dodeca dre dodecahedra volume surface
Oberfl che Volumen truncated tronqu tetra dre Tetraeder tetrahedra cube W rfel
Rhombododekaeder Raumwinkel Kubooktaeder Rhombentriakontaeder Zylinderschnitte
g ometrie math matique Geometrie Zeitgleichung Knoten knots Cubesplitting Covering Power
An Knoten interessiert ? Dann unbedingt: http://knotplot.com/