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## Re: [Polytopia] Having Some Code Fun in Logic Garnet

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• ... From: Michael Donovan Subject: Re: [Polytopia] Having Some Code Fun in Tiling To: Polytopia@yahoogroups.com Date: Monday, September
Message 1 of 52 , Aug 9, 2012
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 You can see how the colored struts would have been perpendicular to the corresponding colored planes that I had mentioned: --- On Mon, 9/13/04, Michael Donovan wrote:From: Michael Donovan Subject: Re: [Polytopia] Having Some Code Fun in TilingTo: Polytopia@yahoogroups.comDate: Monday, September 13, 2004, 12:25 PMWonderful image,But the primary colors fit in another way, those four planes are combinations of the three primary.  Looks like one of Robert Webbs animations from Stella----- Original Message -----From: Alan MichelsonSent: Monday, September 13, 2004 2:57 PMSubject: Re: [Polytopia] Having Some Code Fun in Tilingrybo6 wrote:By the way, if you go to that web page, notice the tetrahedron at http://www.codefun.com/Images/Geometry/DodecTile/image004.jpgEach vertice of the tetrahedron has a color that matches its opposite face. This is because if you were to truncate each vertice, you will get a plane that is parallel to and therefore matches its opposite face. You can see this in You could also see the red, yellow, green, blue color-coded planes inhttp://www.superliminal.com/geometry/infinite/stereo/The upper picture has truncated tetrahedra.The lower picture has truncated octahedra.These were built using Polydron. The colored hexagons are oriented according to the corresponding tetrahedron planes.You can see how this applies to the coloring problem in http://www.codefun.com/Images/Geometry/DodecTile/image006.jpg
• ... …or in this case, the possible [transfer] points from the combinations of intersecting [subway] lines. ... This is from:
Message 52 of 52 , Jan 12, 2013
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> Those same colors were used on the St. Petersburg subway system in
> Russia, before the new Frunzensko-Primorsk aya Line. Notice the
> different combinations of subway lines at the transfer stations
> (Like the edges of the simplex joining the vertexes.)
or in this case, the possible [transfer] points from the combinations of intersecting [subway] lines.

--- In Polytopia@yahoogroups.com, "Alan M" wrote:
>
>
> --- In Polytopia@yahoogroups.com, Alan Michelson wrote:
> >
> > The new Frunzensko-Primorsk aya Line should intersect the other
> > lines, giving more transfer combinations. (Like the edges of the
> > simplex joining the vertexes.)
> or in this case, the possible [transfer] points from the combinations of intersecting [subway] lines.
>
This is from:
http://mathworld.wolfram.com/Combination.html
http://en.wikipedia.org/wiki/Combination
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