edges -- gets the edges of a (hyper)graph

Usage:

E = edges(H)
Inputs:
- H, a hypergraph,
Outputs:
- E, a list, of the edges of H

Description

This function takes a (hyper)graph, and returns the edge set of the (hyper)graph.

i1 : S = QQ[a..d];

i2 : g = graph {a*b,b*c,c*d,d*a} -- the four cycle

o2 = Graph{"edges" => {{a, b}, {b, c}, {a, d}, {c, d}}}
           "ring" => S
           "vertices" => {a, b, c, d}

o2 : Graph

i3 : edges g

o3 = {{a, b}, {b, c}, {a, d}, {c, d}}

o3 : List

i4 : h = hyperGraph{a*b*c}

o4 = HyperGraph{"edges" => {{a, b, c}}    }
                "ring" => S
                "vertices" => {a, b, c, d}

o4 : HyperGraph

i5 : edges h

o5 = {{a, b, c}}

o5 : List

i6 : k4 = completeGraph S

o6 = Graph{"edges" => {{a, b}, {a, c}, {a, d}, {b, c}, {b, d}, {c, d}}}
           "ring" => S
           "vertices" => {a, b, c, d}

o6 : Graph

i7 : edges k4

o7 = {{a, b}, {a, c}, {a, d}, {b, c}, {b, d}, {c, d}}

o7 : List

Ways to use edges:

edges(HyperGraph)

For the programmer

The object edges is a method function.

The source of this document is in EdgeIdeals.m2:2513:0.

edges -- gets the edges of a (hyper)graph

Description

See also

Ways to use edges:

For the programmer