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Messages 1540 - 1570 of 1613   Oldest  |  < Older  |  Newer >  |  Newest
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1540
Hello All, Is there a formula for giving the number of possible configurations for connecting sequentially all twelve faces of a dodecahedron so that each face...
pyth7
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Aug 8, 2007
6:11 pm
1541
What you need to do is go to: * Dodecahedral Graph -- from Wolfram MathWorld <http://mathworld.wolfram.com/DodecahedralGraph.html> * Icosahedral Graph -- from...
Alan Michelson
a.michelson
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Aug 9, 2007
3:17 am
1543
This group has been pretty good about not posting off topic over the last 6 years (wow Polytopia for 6 years!)- but still a few slip through the cracks. I...
Dan
polychoron
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Nov 9, 2007
11:11 pm
1544
Anyone familiar with Theodorus of Cyrene's construction of square roots with a spiraling manifold of right triangles? ...
Dan
polychoron
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Nov 9, 2007
11:21 pm
1545
... http://courses.wcupa.edu/jkerriga/Lessons/A%20Lesson%20on%20Spirals.html ... n ATAN(1/(SQRT(n))) Degrees Cumulative Angles Degrees 1 0.7853981634...
Alan Michelson
a.michelson
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Nov 10, 2007
1:34 am
1546
Thanks for that table Alan! My thoughts are that Theodorus first constructed it with compass and ruler- which gave the required precision without much...
Dan
polychoron
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Nov 13, 2007
3:33 pm
1547
... * Trigonometry <http://mathworld.wolfram.com/Trigonometry.html> * Inverse Trigonometric Functions ...
Alan Michelson
a.michelson
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Nov 13, 2007
6:40 pm
1548
I have a question--a comment to the original post stated that 17 is the first number for which the even-odd concept used in the proof of the irrationality of...
John Chalmers
jhchalme
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Nov 13, 2007
7:48 pm
1549
... If it is a multiple <http://en.wikipedia.org/wiki/Multiple_%28mathematics%29> of two <http://en.wikipedia.org/wiki/Two> , then it is an even number, else...
Alan Michelson
a.michelson
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Nov 13, 2007
8:28 pm
1550
Thanks, I understand the example proof, but my question was whether there is something unique about 17 and its square root as implied in the post, other than...
John Chalmers
jhchalme
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Nov 13, 2007
8:36 pm
1551
Alan: Thanks--I was able to download McCabe's article on Theodorus's methods and answer my question. The previous reference I had was incorrect. --John...
John Chalmers
jhchalme
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Nov 13, 2007
8:47 pm
1552
... A Fermat prime <http://mathworld.wolfram.com/FermatPrime.html> is a Fermat number <http://mathworld.wolfram.com/FermatNumber.html> Fn = 2^(2^n)+1 that is...
Alan Michelson
a.michelson
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Nov 14, 2007
1:14 am
1553
I am a math/physics/electronics specialist as well as a very spiritually in-tuned. Looks like the last discussions have been numerology inclined. I will do my...
Mr Gray
mrzeta7
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Nov 25, 2007
4:44 am
1554
... There is going to be a Great Pyramid replica <http://en.wikipedia.org/wiki/Try2004> in Japan. You remember Paolo Soleri...
Alan Michelson
a.michelson
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Nov 26, 2007
1:03 am
1555
COMING today @ 12 noon 90.7 KPFK Radio Interview the Sound Exchange with Jay Kugelman Alan Michelson <amichelson2002@...> wrote: Gregg Fleishman was on...
Alan Michelson
a.michelson
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Feb 1, 2008
6:49 pm
1556
For those who are interested... Visit this website: http://home.att.net/~bob.rutkiewicz/physics.htm However, no mathematical equations found on this site... ...
Asdad Asdda
dennisatspeyk
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Feb 5, 2008
10:42 am
1557
... http://www.domeclimber.com/freqs.php...
Alan Michelson
a.michelson
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Apr 4, 2008
3:20 am
1558
Hello Dome People, I have a 22.68 Foot diameter 4-v Geodesic dome made of 1 inch conduit. This dome uses Hubs that were designed to speed and simplify...
Harold
vwbiofuels
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May 2, 2008
10:40 pm
1559
Hi Alan From what I see, there are 9 different triangles for the 5f triacon at the domeclimber.com link. How many are there for Pete's 6f dome? There must be a...
Dick Fischbeck
dick_fischbeck
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Aug 6, 2008
9:31 pm
1560
... I went to id:A097108 - OEIS Search Results <http://www.research.att.com/%7Enjas/sequences/A097108> and I found "FORMULA: Satisfies a linear recurrence...
Alan Michelson
a.michelson
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Aug 7, 2008
1:14 am
1561
Hi all: I'm interested in figuring out a general algorithm for mapping 2D images onto adjacent triangles of geodesic surface (for different frequency...
bruce1618r
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Oct 13, 2008
5:28 pm
1562
I don't think this answers your question, but it sounded like something close enough for me to show off my icosahedral creation: ...
Mitch Powell
mitchpowell2
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Oct 13, 2008
6:23 pm
1563
Hey guys, I had made a whole bunch of animations of as many polychora as I could get net data (or figure it out) for back in 2004. I've finally found them,...
wildstar2002
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Oct 13, 2008
8:16 pm
1564
And then, like an idiot, i forgot to include the site addy! http://www.youtube.com/user/WildStar2002 - Burt (aka Tuvel)...
wildstar2002
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Oct 13, 2008
8:26 pm
1565
Burt~ Thank you so much for posting this!!! I have a 7 year old son (just turned 7 on Sunday). He is the reason I belong to this group...his favorite things...
jenniyoungkurtz
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Oct 13, 2008
10:37 pm
1566
Hey, Rybo: This <http://tech.ph.groups.yahoo.com/group/Polytopia/photos/view/4133?b=1> looks like the 6 Gr C's of the Icosahedron. Notice the six colors that ...
Alan Michelson
a.michelson
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Oct 14, 2008
4:12 am
1567
Hi everyone, Hope this is ok to post here... You can see a list of my groups on Grouply at the link below. Maybe you'll find some you want to join. ron Here's...
ron nor
macro9ron99
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Oct 14, 2008
3:37 pm
1568
Jenn, I can't tell you how much it pleases me that your son will like these animations. :-) Thank you so much for saying so - and I think we can all look...
wildstar2002
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Oct 14, 2008
4:57 pm
1569
I uploaded two new photo albums, Geodesic Sphere and Zome Constructions, to the Polytopia photos. The Geodesic sphere is six frequency made from coffee...
phi16
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Oct 19, 2008
4:22 pm
1570
Allen~   Many thanks for these stunning pics!  My little guy (he just turned 7!) wants to know if he can print them out so he can try to build the Zome...
jennifer kurtz
jenniyoungkurtz
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Oct 20, 2008
11:13 pm
Messages 1540 - 1570 of 1613   Oldest  |  < Older  |  Newer >  |  Newest
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