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user4676
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A simplicial set $X$ is a a combinatorial model for a topological space $|X|$, its realization, and conversely every topological space is weakly equivalent to such a realization of a simplicial set. I am wondering, which properties of finite simplicial sets can be effectively (or even theoretically) computed using a computer program. Maybe there are some implementations and I am not aware of their existence, so I would be very pleased about any information.

The first problem is how to input the simplicial set (maybe that's not really a problem).

Does one know terminating algorithms for the following problems then? Are there other problems for which anything is known in this direction?

  1. Is a given finite simplicial set a Kan complex?
  2. Given two finite simplicial sets $X$ and $Y$, are $|X|$ and $|Y|$ homeomorphic?
  3. Given two finite simplicial sets $X$ and $Y$, are $|X|$ and $|Y|$ homotopy equivalent?
  4. What are the homotopy/homology groups of a given Kan complex?
  5. Given a finite simplicial set $X$, what are the homotopy/homology groups of $|X|$Given a finite simplicial set $X$, what are the homotopy/homology groups of $|X|$?

etc.

A simplicial set $X$ is a a combinatorial model for a topological space $|X|$, its realization, and conversely every topological space is weakly equivalent to such a realization of a simplicial set. I am wondering, which properties of finite simplicial sets can be effectively (or even theoretically) computed using a computer program. Maybe there are some implementations and I am not aware of their existence, so I would be very pleased about any information.

The first problem is how to input the simplicial set (maybe that's not really a problem).

Does one know terminating algorithms for the following problems then? Are there other problems for which anything is known in this direction?

  1. Is a given finite simplicial set a Kan complex?
  2. Given two finite simplicial sets $X$ and $Y$, are $|X|$ and $|Y|$ homeomorphic?
  3. Given two finite simplicial sets $X$ and $Y$, are $|X|$ and $|Y|$ homotopy equivalent?
  4. What are the homotopy/homology groups of a given Kan complex?
  5. Given a finite simplicial set $X$, what are the homotopy/homology groups of $|X|$?

etc.

A simplicial set $X$ is a a combinatorial model for a topological space $|X|$, its realization, and conversely every topological space is weakly equivalent to such a realization of a simplicial set. I am wondering, which properties of finite simplicial sets can be effectively (or even theoretically) computed using a computer program. Maybe there are some implementations and I am not aware of their existence, so I would be very pleased about any information.

The first problem is how to input the simplicial set (maybe that's not really a problem).

Does one know terminating algorithms for the following problems then? Are there other problems for which anything is known in this direction?

  1. Is a given finite simplicial set a Kan complex?
  2. Given two finite simplicial sets $X$ and $Y$, are $|X|$ and $|Y|$ homeomorphic?
  3. Given two finite simplicial sets $X$ and $Y$, are $|X|$ and $|Y|$ homotopy equivalent?
  4. What are the homotopy/homology groups of a given Kan complex?
  5. Given a finite simplicial set $X$, what are the homotopy/homology groups of $|X|$?

etc.

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user4676
  • 727
  • 7
  • 11

A simplicial set $X$ is a a combinatorial model for a topological space $|X|$, its realization, and conversely every topological space is weakly equivalent to such a realization of a simplicial set. I am wondering, which properties of finite simplicial sets can be effectively (or even theoretically) computed using a computer program. Maybe there are some implementations and I am not aware of their existence, so I would be very pleased about any information.

The first problem is how to input the simplicial set (maybe that's not really a problem).

Does one know terminating algorithms for the following problems then? Are there other problems for which anything is known in this direction?

  1. Is a given finite simplicial set a Kan complex?Is a given finite simplicial set a Kan complex?
  2. Given two finite simplicial sets $X$ and $Y$, are $|X|$ and $|Y|$ homeomorphic?
  3. Given two finite simplicial sets $X$ and $Y$, are $|X|$ and $|Y|$ homotopy equivalent?
  4. WhatWhat are the homotopy/homology groups of a given Kan complex?
  5. Given a finite simplicial set $X$, what are the homotopy/homology groups of a given Kan complex$|X|$?

etc.

A simplicial set $X$ is a a combinatorial model for a topological space $|X|$, its realization, and conversely every topological space is weakly equivalent to such a realization of a simplicial set. I am wondering, which properties of finite simplicial sets can be effectively (or even theoretically) computed using a computer program. Maybe there are some implementations and I am not aware of their existence, so I would be very pleased about any information.

The first problem is how to input the simplicial set (maybe that's not really a problem).

Does one know terminating algorithms for the following problems then? Are there other problems for which anything is known in this direction?

  1. Is a given finite simplicial set a Kan complex?
  2. Given two finite simplicial sets $X$ and $Y$, are $|X|$ and $|Y|$ homeomorphic?
  3. Given two finite simplicial sets $X$ and $Y$, are $|X|$ and $|Y|$ homotopy equivalent?
  4. What are the homotopy/homology groups of a given Kan complex?

etc.

A simplicial set $X$ is a a combinatorial model for a topological space $|X|$, its realization, and conversely every topological space is weakly equivalent to such a realization of a simplicial set. I am wondering, which properties of finite simplicial sets can be effectively (or even theoretically) computed using a computer program. Maybe there are some implementations and I am not aware of their existence, so I would be very pleased about any information.

The first problem is how to input the simplicial set (maybe that's not really a problem).

Does one know terminating algorithms for the following problems then? Are there other problems for which anything is known in this direction?

  1. Is a given finite simplicial set a Kan complex?
  2. Given two finite simplicial sets $X$ and $Y$, are $|X|$ and $|Y|$ homeomorphic?
  3. Given two finite simplicial sets $X$ and $Y$, are $|X|$ and $|Y|$ homotopy equivalent?
  4. What are the homotopy/homology groups of a given Kan complex?
  5. Given a finite simplicial set $X$, what are the homotopy/homology groups of $|X|$?

etc.

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François G. Dorais
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user4676
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