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Joseph O'Rourke
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I know that iterating the following incircle construction approaches an equilateral triangle in the limit:
     Incircle Iteration
Starting with any triangle $T$, one forms $T'$ by connecting the three points of tangency of the circle inscribed inside $T$.

Does the analogous process for tetrahedra approach a regular tetrahedron? And the same question may be asked for simplices in $\mathbb{R}^d$. A reference would be appreciated—Thanks!


   ![InSphere][2]

I know that iterating the following incircle construction approaches an equilateral triangle in the limit:
     Incircle Iteration
Starting with any triangle $T$, one forms $T'$ by connecting the three points of tangency of the circle inscribed inside $T$.

Does the analogous process for tetrahedra approach a regular tetrahedron? And the same question may be asked for simplices in $\mathbb{R}^d$. A reference would be appreciated—Thanks!

I know that iterating the following incircle construction approaches an equilateral triangle in the limit:
     Incircle Iteration
Starting with any triangle $T$, one forms $T'$ by connecting the three points of tangency of the circle inscribed inside $T$.

Does the analogous process for tetrahedra approach a regular tetrahedron? And the same question may be asked for simplices in $\mathbb{R}^d$. A reference would be appreciated—Thanks!


   ![InSphere][2]
Better phrasing.
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Joseph O'Rourke
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I know that iterating the following incircle construction approaches an equilateral triangle in the limit:
     Incircle Iteration
Starting with any triangle $T$, one forms $T'$ by connecting the three points of tangency of the incircle tocircle inscribed inside $T$.

Does the analogous process for tetrahedra approach a regular tetrahedron? And the same question may be asked for simplices in $\mathbb{R}^d$. A reference would be appreciated—Thanks!

I know that iterating the following incircle construction approaches an equilateral triangle in the limit:
     Incircle Iteration
Starting with any triangle $T$, one forms $T'$ by connecting the three points of tangency of the incircle to $T$.

Does the analogous process for tetrahedra approach a regular tetrahedron? And the same question may be asked for simplices in $\mathbb{R}^d$. A reference would be appreciated—Thanks!

I know that iterating the following incircle construction approaches an equilateral triangle in the limit:
     Incircle Iteration
Starting with any triangle $T$, one forms $T'$ by connecting the three points of tangency of the circle inscribed inside $T$.

Does the analogous process for tetrahedra approach a regular tetrahedron? And the same question may be asked for simplices in $\mathbb{R}^d$. A reference would be appreciated—Thanks!

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Source Link
Joseph O'Rourke
  • 150.8k
  • 36
  • 358
  • 958
Source Link
Joseph O'Rourke
  • 150.8k
  • 36
  • 358
  • 958
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