Reconnectads. (English) Zbl 07873568
Summary: We introduce a new operad-like structure that we call a reconnectad; the “input” of an element of a reconnectad is a finite simple graph, rather than a finite set, and “compositions” of elements are performed according to the notion of the reconnected complement of a subgraph. The prototypical example of a reconnectad is given by the collection of toric varieties of graph associahedra of Carr and Devadoss, with the structure operations given by inclusions of orbits closures. We develop the general theory of reconnectads, and use it to study the “wonderful reconnectad” assembled from homology groups of complex toric varieties of graph associahedra.
MSC:
| 14M25 | Toric varieties, Newton polyhedra, Okounkov bodies |
| 18M70 | Algebraic operads, cooperads, and Koszul duality |
| 18M75 | Topological and simplicial operads |
Software:
operadsReferences:
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