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Polytopia

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  • Members: 410
  • Category: Geometry
  • Founded: Dec 10, 2001
  • Language: English
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Messages 1506 - 1535 of 1736   Oldest  |  < Older  |  Newer >  |  Newest
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1506 Dan
polychoron Send Email
May 13, 2007
8:07 pm
... Exactly! The dual of the hyperdodecahedron (a.k.a. 120-cell) is the hypericosahedron (a.k.a. 600-cell) Look at the numbers of each facet- Hyperdodecahedron...
1507 Alan Michelson
a.michelson Send Email
May 14, 2007
1:55 am
... No, it's 720 edges [Eager, Eager]...
1508 dar kone
zarkorgon Send Email
May 15, 2007
9:54 pm
Hey folks, does anyone know if the following exists somewhere on line? Rotatable animation (preferably something like a jave applet or similiar), that has two...
1509 Bruce Rawles
bruce1618r Send Email
May 15, 2007
10:15 pm
Perhaps not exactly what you're looking for, but maybe this will help... If you're not in a hurry (a bit busy this week), I could create an updated version of...
1510 dar kone
zarkorgon Send Email
May 16, 2007
9:16 am
Bruce, thanks for the reply and great site by the way! No hurry, would love to see more of your work! Bruce Rawles <bruce@...> wrote: Perhaps not...
1511 Alan Michelson
a.michelson Send Email
May 16, 2007
5:40 pm
... help... ... <http://www.geometrycode.com/animations/index.shtml> If you are interested in Clockwise and Counter-clockwise rotations superimposed...
1512 dar kone
zarkorgon Send Email
May 17, 2007
4:59 am
very cool! how about doing various transforms on the tetra such as deformations etc? what would be awesome would be an interactive tetra wire frame that you...
1513 Alan Michelson
a.michelson Send Email
May 17, 2007
5:06 pm
... deformations etc? Yes, try going to http://tech.groups.yahoo.com/group/Polytopia/files/Star-of-David.gif ...
1514 John H. Chalmers
jhchalme Send Email
May 19, 2007
5:19 pm
Arrays of regular tetrahedrons do not fill Euclidean space completely-- they leave octahedral holes, though they may in Hyperbolic 3-D space. I'd have to find...
1515 Alan Michelson
a.michelson Send Email
May 19, 2007
7:02 pm
... completely-- ... Not necessarily hyperbolic space — for example: * {3,3,3} — Three tetrahedrons around edge — Pentatope * {3,3,4} — Four...
1516 John H. Chalmers
jhchalme Send Email
May 19, 2007
7:33 pm
Alan: Thanks for the information. I was thinking of 3-D space at the time, not 4-D. I located my copies of Regular Polytopes and Regular Convex Polytopes, and...
1517 Alan Michelson
a.michelson Send Email
May 22, 2007
8:07 pm
... But see the: * http://en.wikipedia.org/wiki/List_of_regular_polytopes#Apeirotopes <http://en.wikipedia.org/wiki/List_of_regular_polytopes#Apeirotopes> * ...
1518 John H. Chalmers
jhchalme Send Email
May 22, 2007
10:01 pm
Thanks, I'm swamped today, but I'll look at these as soon as I can. --John -- No virus found in this outgoing message. Checked by AVG Free Edition. Version:...
1519 Alan Michelson
a.michelson Send Email
May 24, 2007
6:58 pm
The pyramid structure would be composed of 55 smaller pyramids stacked five high. This is similar to the cannonball pyramids of the Amazing Race. (All text is...
1520 Summer Twain
yonibluestar Send Email
May 25, 2007
6:08 pm
Millennium Twain wrote in: http://www.ojaipost .com/2007/ 05/queen_ the_movie_ diana_the_dram.shtml Is 'She', Elder, Woman, Queen Elizabeth II, more than...
1521 Alan Michelson
a.michelson Send Email
May 31, 2007
5:41 pm
... That's called the Small rhombitrihexagonal tiling <http://en.wikipedia.org/wiki/Small_rhombitrihexagonal_tiling> — its dual is the Deltoidal...
1522 Bruce Rawles
bruce1618r Send Email
May 31, 2007
5:50 pm
Great wiki link; thanks! ...I also have full-page (8.5" x 11") templates for all the regular polygon tilings (and MUCH more, tilings and otherwise) in my book,...
1523 Adrian Rossiter
adrianrossiter Send Email
May 31, 2007
6:19 pm
Hi Alan ... Also, you wouldn't be able to tile a one-sided surface with it if it was chiral http://www.freewebtown.com/adrian/tmp/ut_align02b.jpg ...
1524 Alan Michelson
a.michelson Send Email
May 31, 2007
7:44 pm
... either! ... I can see that it is not chiral, however the pattern would have to be aligned with the lines of symmetry that don't pass through the squares ...
1525 John Berglund
anisohedral Send Email
Jun 1, 2007
1:18 am
Snubbing will usually produce left hand and right hand versions. But if we snub something that is its own dual, snubbing will only produce one version. In the...
1526 Adrian Rossiter
adrianrossiter Send Email
Jun 4, 2007
9:15 am
Hi John ... I followed up my original post with some reasoning for why this would be the case http://tech.groups.yahoo.com/group/Polytopia/message/1274 Adrian....
1527 Alan Michelson
a.michelson Send Email
Jun 19, 2007
7:46 pm
Adrian Rossiter has the right idea: http://www.freewebtown.com/adrian/misc/anim_hc01.gif <http://www.freewebtown.com/adrian/misc/anim_hc01.gif> ... ...
1528 Alan Michelson
a.michelson Send Email
Jun 23, 2007
12:47 am
Math is turning bad <http://www.batkhela.com/jokes/show/math_is_turning_bad/352/>...
1529 Alan Michelson
a.michelson Send Email
Jun 27, 2007
12:28 am
Weapons of Math Instruction <http://www.pen.k12.va.us/Div/Winchester/jhhs/math/humor/mathweap.html>...
1530 Phil S
rebitnic Send Email
Jun 27, 2007
5:54 pm
Hello, This is just two funny, the one who thought this up should get a medal. It's very to see how others think.!!!. Stay - Safe. Phil. Austin,Tx Alan...
1531 Harold
vwbiofuels Send Email
Jul 2, 2007
3:36 am
Hello I am new, and this seems like a very tech oriented site. I may be here by mistake.? I am trying to find a set of hubs for a simple four frequency...
1532 Alan Michelson
a.michelson Send Email
Jul 2, 2007
5:19 am
You can try the TekKit <http://www.tekstaronline.com/products/tekkit_body.html> and TekCAD <http://www.tekstaronline.com/products/tekcad.html> models. ... ...
1533 Boston Math
boston_math Send Email
Jul 6, 2007
1:25 am
Hello, I had a question in numerical analysis. Any suggestions are greatly appreciated. (1) Given F(x) = 0, numerically find the roots. Essentially, split an...
1534 Harold
vwbiofuels Send Email
Jul 23, 2007
8:51 pm
Hey all, I have been working on a 6v geodesic dome design that requires only six strut lengths. (Based on the icosahedron) Using this theory; any frequency...
1535 allenlubow@...
phi16 Send Email
Jul 24, 2007
1:51 pm
Harold, Check out this site: http://www.desertdomes.com/rev4calc.html Your information is incorrect. There are nine lengths of struts in a 6v dome or sphere....
Messages 1506 - 1535 of 1736   Oldest  |  < Older  |  Newer >  |  Newest
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