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Difference between revisions of "Tetrahedral coordinates"

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''of a point <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/t/t092/t092490/t0924901.png" /> in three-dimensional space''
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''of a point $P$ in three-dimensional space''
  
Numbers <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/t/t092/t092490/t0924902.png" /> which are proportional (with given coefficient of proportionality) to the distances from <img align="absmiddle" border="0" src="https://www.encyclopediaofmath.org/legacyimages/t/t092/t092490/t0924903.png" /> to the faces of a fixed [[Tetrahedron|tetrahedron]], not necessarily regular. Analogously, one may introduce general normal coordinates for any dimension. The two-dimensional analogues of tetrahedral coordinates are called trilinear coordinates. See also [[Barycentric coordinates|Barycentric coordinates]].
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Numbers $x_1,x_2,x_3,x_4$ which are proportional (with given coefficient of proportionality) to the distances from $P$ to the faces of a fixed [[Tetrahedron|tetrahedron]], not necessarily regular. Analogously, one may introduce general normal coordinates for any dimension. The two-dimensional analogues of tetrahedral coordinates are called trilinear coordinates. See also [[Barycentric coordinates|Barycentric coordinates]].
  
  

Revision as of 15:37, 15 April 2014

of a point $P$ in three-dimensional space

Numbers $x_1,x_2,x_3,x_4$ which are proportional (with given coefficient of proportionality) to the distances from $P$ to the faces of a fixed tetrahedron, not necessarily regular. Analogously, one may introduce general normal coordinates for any dimension. The two-dimensional analogues of tetrahedral coordinates are called trilinear coordinates. See also Barycentric coordinates.


Comments

References

[a1] H.S.M. Coxeter, "Regular polytopes" , Dover, reprint (1973) pp. 183
How to Cite This Entry:
Tetrahedral coordinates. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Tetrahedral_coordinates&oldid=31739
This article was adapted from an original article by D.D. Sokolov (originator), which appeared in Encyclopedia of Mathematics - ISBN 1402006098. See original article