Diferencia entre revisiones de «Número tetraédrico»

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El tetrahedron con una longitud basicabásica 4 (summing up to 20) can be looked at as the 3-dimensional analogue of the [[tetractys]], el cuarto [[numeronúmero triangular]] (summing up to 10). El tetractys era considerado [[sagrado]] por los [[Pythagoreans]].
 
When order-''n'' tetrahedra built from ''T''<sub>''n''</sub> spheres are used as a unit, it can be shown that a space tiling with such units can achieve a densest [[sphere packing]] as long as ''n''&nbsp;≤&nbsp;4 [http://www.pisquaredoversix.force9.co.uk/Tetrahedra.htm].
 
La [[paridad]] de los numerosnúmeros tetrahedral follows the repeating pattern odd-even-even-even.
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