neighbors -- returns the neighbors of a vertex or list of vertices

Synopsis

• Usage:

  N = neighbors(H,V)

  N = neighbors(H,n)

  N = neighbors(H,L)

• Inputs:
  • H, a hypergraph,
  • V, a ring element, a vertex
  • n, an integer, the index of a vertex
  • L, a list, a list of vertices or indices of vertices
• Outputs:
  • N, a list, of neighbors to the given vertex or vertices

Description

i1 : R = QQ[a..f];

i2 : G = graph {a*b, a*c, a*d, d*e, d*f};

i3 : neighbors(G,a)

o3 = {b, c, d}

o3 : List

i4 : neighbors(G,0)

o4 = {b, c, d}

o4 : List

i5 : neighbors(G,{a,d})

o5 = {b, c, e, f}

o5 : List

i6 : neighbors(G,{0,3})

o6 = {b, c, e, f}

o6 : List

See also

• degreeVertex -- returns the degree of a vertex
• vertices(HyperGraph) -- gets the vertices of a (hyper)graph