# Spahn combinatorial shape (Rev #5, changes)

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One way to define higher structures is via functors on categories of combinatorial shapes (also called categories of geometric shapes).

Other approaches to define higher structures are by enrichment? or by internalization?.

## References

Revision on November 13, 2012 at 15:56:14 by Stephan Alexander Spahn?. See the history of this page for a list of all contributions to it.