Talk:Cube

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Contents 1 Trivia 2 New stat table 3 added face/facet/side 4 Equation 5 those idiot redirections 6 Hypercubes 7 "Combinatorial cubes" 8 Request: Internal angles 9 Definition 10 How would this look

[edit] Trivia

If each edge of a cube is replaced by a one ohm resistor, the resistance between opposite vertices is 5/6 ohms, and that between adjacent vertices 7/12 ohms.

...Above text was deleted by IP user. I copied it here rather than reverting or allowing it to be lost in case anyone cares. Tom Ruen 09:25, 10 January 2006 (UTC)

[edit] New stat table

I replace stat table with template version, which uses tricky nested templates as a "database" which allows the same data to be reformatted into multiple locations and formats. See here for more details: User:Tomruen/polyhedron_db_testing

Tom Ruen 00:53, 4 March 2006 (UTC)

[edit] added face/facet/side

to clarify meaning. 0waldo 02:12, 17 May 2006 (UTC)

Was it in doubt? —Tamfang 15:16, 17 May 2006 (UTC)

[edit] Equation

The equation for a cube is , where s is the length of a side. Is this worth mentioning? If no one objects, I will add it. ForrestVoight 15:06, 13 June 2006 (UTC)

Are you sure that's a cube and not an octahedron? -- Jitse Niesen (talk) 13:31, 13 June 2006 (UTC)

For a cube, try max(|x|, |y|, |z|) = s/2, instead. -- The Anome 13:37, 13 June 2006 (UTC)

Oops, thats an octahedron. Do you think it should go on the octahedron page? ForrestVoight 15:06, 13 June 2006 (UTC)

Yes, go ahead. Cube, Sphere and Octahedron could each have a brief passage comparing the ∞-norm (measure polytope), 2-norm (sphere) and 1-norm (cross polytope). —Tamfang 17:32, 13 June 2006 (UTC)

That's an excellent idea. -- The Anome 21:28, 14 June 2006 (UTC)

I've added three sentences to Norm (mathematics). —Tamfang 22:15, 14 June 2006 (UTC)

[edit] those idiot redirections

are apparently part of a long pattern, see Wikipedia:Long term abuse/Videogamer. —Tamfang 05:21, 25 August 2006 (UTC)

[edit] Hypercubes

We need some terminology cleaned up. The name measure polytope is rare at best. I have changed it to hypercube and "n-cube". There is a move being considered of the page "measure polytope" to "hypercube" (see their talk pages). Zaslav 02:02, 16 November 2006 (UTC)

[edit] "Combinatorial cubes"

I replaced this, which was incomprehensibly vague, by a brief description of the cube graph and the 3-dimensional Hamming graph. A full discussion of either one appears in separate articles, hypercube graph and Hamming graph. If the person who wanted to describe k-ary n-cubes wishes to write a readable article, it should appear under that title (but first check to see if it's different from a Hamming graph). Zaslav 07:44, 21 November 2006 (UTC)

[edit] Request: Internal angles

An IP editor left the following request in the article: "Could someone please add the internal angles within a cube. I am particularly interested in the angles of the internal diagonal. Thank you." -- Jitse Niesen (talk) 10:40, 5 January 2007 (UTC)

[edit] Definition

I've just had a long discussion with the father of a nine year old who was told at school that the number of sides a solid cylindrical object (e.g. tin can) has is two, and the number of edges is zero. This is all based upon the understanding in the school syllabus where a side is a flat surface, and an edge is where two sides meet. This leads to things like a sphere as having no sides. Well all this seems rather badly defined to me, and made me wonder if the definition here is all that it could be.

I think side is good term for 2 dimensional objects like a square or a triangle etc. A 3D object is better described in terms of surfaces (although I can see that using a term such as face, side or facet is not being incorrect). I hesitate to change this without some feedback, but I wonder if the definition would better be something like:

A cube is a three-dimensional solid object bounded by six square flat surfaces, with three surfaces meeting at each vertex.

I think that would be better. However, one person (and anom. at that) doesn't make a consensus. I think you better wait. 76.188.26.92 20:18, 2 November 2007 (UTC)

[edit] How would this look

I was just looking at the tesseract page and I saw a 3D projection of a rotating 4-cube. This would be what we would see if a rotating, clear tesseract suddenly appeared in front of us. I thought that if 3Dals (meaning three-dimensional [object/being]) could see a simplified 4Dal, then a 2Dal may see asimple 3Dal. Could someone describe a projection of a rotting cube as a Flatlander would see it to me? An animation would probably be helpful, if it isn't to much trouble. Merci bien, 76.188.26.92 20:23, 2 November 2007 (UTC)