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2 votes
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109 views

Description of a point cloud being "undersampled" wrt persistent homology, confidence level?

I am completely new to topological data analysis, so I apologise if this is a well-known area of persistent homology, as well as for any imprecise language. Suppose we know completely the topological ...
Jake Lai's user avatar
2 votes
0 answers
97 views

First Betti number of a Reeb graph is not greater than that of the space?

(I have asked this question at math stackexchange, it was upvoted but got no answers; maybe you can help.) It is well-known that $\beta_1(R(f))\le\beta_1(X)$, where $\beta_1$ is the first Betti ...
Alexander Gelbukh's user avatar
2 votes
0 answers
53 views

Facet counting argument for polytopes

Consider a pair of piecewise-linear cobordant $n$ dimensional polyhedra $P_1, P_2$ sitting in $\mathbb{R}^{n+2}$ (with some fixed orientation). Let $O$ be an $n+1$ dimensional piecewise-linear ...
Sidharth Ghoshal's user avatar
1 vote
0 answers
86 views

Explicit form of boundary operators of topological cones

Let $\Omega$ be a regular, finite, $n$-dimensional CW complex with chain modules $\mathscr{C}_k$ and boundary operators $\partial_k$. For many problems in computational geometry, a key operation is to ...
Daniel Shapero's user avatar
1 vote
0 answers
126 views

cohomology ring of compact submanifolds of Euclidean spaces

Suppose we have a compact $m$-dimensional submanifold $M$ of $\mathbb{R}^N$ and we want to know the cohomology ring $H^*(M;\mathbb{Z})$. Let $\epsilon>0$ and a $m$-dimensional finite simplicial ...
Shiquan Ren's user avatar
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