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antiprism

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Group Information

  • Members: 82
  • Category: Geometry
  • Founded: Nov 2, 2006
  • Language: English
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Activity within 7 days:

Description

An informal group for discussing geometry. A creative environment in which to share ideas and investigate problems. All topics are welcome, especially those relating to polyhedra, physical and computer modelling, design, decoration, crafts and recreational geometry.

The group has a natural focus on the use and development of the Antiprism programs, but discussion of any relevant program or project is welcome.

Most Recent Messages

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Self Dual Toroids
Hi All, Jim McNeill asked and then found simultaneously a class of self dual toroids. These can be generate with antiprism. Here is a 3-form. unitile2d -s t -l
Posted - Fri May 17, 2013 6:36 pm
Roger Kaufman
vortexswirling
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Re: reciprical when not on center
Hi Adrian, ... I have made the example that Jim is seeing. What I was doing still had zeroes in its location so it affected reciprocation. In the package Jim
Posted - Fri May 17, 2013 6:15 pm
Roger Kaufman
vortexswirling
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Re: Not just a 2-D GIF anymore...
<http://www.math.brown.edu/~heeoh/AMSKMS.pdf> ... <http://en.wikipedia.org/wiki/Apollonian_packing#Links_with_hyperbolic_geometry>
Posted - Fri May 17, 2013 4:50 pm
Alan M
a.michelson
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Re: reciprical when not on center
Hi Roger ... pol_recip will work on polyhedron compounds, but the result of your example command is not what it seems, as the reciprocal of each cube is not a
Posted - Fri May 17, 2013 2:11 pm
Adrian Rossiter
adrianrossiter
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reciprical when not on center
Hi Adrian, Jim McNeill is interested in the dual of hemi polyhedra when they are not on center. To achieve this in another program, he took two
Posted - Thu May 16, 2013 4:50 pm
Roger Kaufman
vortexswirling
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Message History

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2013 44 64 61 92 29
2012 82 165 209 131 5 24 61 39 27 289 75 108
2011 111 52 59 78 56 60 48 165 17 8
2010 47 130 178 176 127 189 187 217 75 53 6 12
2009 129 150 261 34 100 69 136 104 84 337 90 89
2008 76 89 68 51 60 202 104 20 34 280 265 40
2007 49 106 119 119 82 66 127 99 35 108 112 121
2006 30 146

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