Bochner's Method for Cell Complexes and Combinatorial Ricci Curvature |
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Authors: | Forman |
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Affiliation: | (1) Department of Mathematics, Rice University, Houston, TX 77251, USA forman@math.rice.edu, US |
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Abstract: | Abstract. In this paper we present a new notion of curvature for cell complexes. For each p , we define a p th combinatorial curvature function, which assigns a number to each p -cell of the complex. The curvature of a p -cell depends only on the relationships between the cell and its neighbors. In the case that p=1 , the curvature function appears to play the role for cell complexes that Ricci curvature plays for Riemannian manifolds.
We begin by deriving a combinatorial analogue of Bochner's theorems, which demonstrate that there are topological restrictions
to a space having a cell decomposition with everywhere positive curvature. Much of the rest of this paper is devoted to comparing
the properties of the combinatorial Ricci curvature with those of its Riemannian avatar. |
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