Identifier
Values
['A',1] => ([],1) => ([],1) => ([],1) => 1
['A',2] => ([(0,2),(1,2)],3) => ([(1,2)],3) => ([(1,2)],3) => 2
['B',2] => ([(0,3),(1,3),(3,2)],4) => ([(2,3)],4) => ([(2,3)],4) => 2
['G',2] => ([(0,5),(1,5),(3,2),(4,3),(5,4)],6) => ([(4,5)],6) => ([(4,5)],6) => 2
['A',3] => ([(0,4),(1,3),(2,3),(2,4),(3,5),(4,5)],6) => ([(1,2),(1,5),(2,4),(3,4),(3,5),(4,5)],6) => ([(1,5),(2,4),(3,4),(3,5)],6) => 16
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Description
The number of spanning subgraphs of a graph.
This is the number of subsets of the edge set of the graph, or the evaluation of the Tutte polynomial at x=y=2.
This is the number of subsets of the edge set of the graph, or the evaluation of the Tutte polynomial at x=y=2.
Map
connected complement
Description
The componentwise connected complement of a graph.
For a connected graph G, this map returns the complement of G if it is connected, otherwise G itself. If G is not connected, the map is applied to each connected component separately.
For a connected graph G, this map returns the complement of G if it is connected, otherwise G itself. If G is not connected, the map is applied to each connected component separately.
Map
incomparability graph
Description
The incomparability graph of a poset.
Map
to root poset
Description
The root poset of a finite Cartan type.
This is the poset on the set of positive roots of its root system where α≺β if β−α is a simple root.
This is the poset on the set of positive roots of its root system where α≺β if β−α is a simple root.
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