title: Width (disambiguation)
text: # Width (disambiguation)
  
  Width is a measure of distance from side to side, measuring across an object at right angles to the length.
  
  Width may also refer to:
  
  ## Graph theory
  
  * Width of a partial order - the cardinality of a maximum antichain.
  * Width of a tree decomposition of an undirected graph, one less the size of the largest vertex-set in the decomposition.
  * Width of a path decomposition of an undirected graph, one less than the size of the largest set in the decomposition
  * Width of a branch decomposition of an undirected graph, the maximum number of shared vertices of any pair of subgraphs formed by removing an edge from the tree.
  * Clique-width of a graph, the minimum number of distinct labels needed to construct G by operations that create a labeled vertex, form the disjoint union of two labeled graphs, add an edge connecting all pairs of vertices with given labels, or relabel all vertices with a given label.
  * The width of a graph is an alternative name for the degeneracy of the graph - the smallest k for which every subgraph has a vertex of degree at most k.
  * Bandwidth of a graph - the minimum, over all orderings of vertices of G, of the length of the longest edge (the number of steps in the ordering between its two endpoints).
  * Width of a hypergraph - the size of a smallest subset of edges that meets all other edges.
  
  ## Programming
  
  * %$WIDTH%, a computer environment variable in DOS Plus
  
  ## People
  
  * Per Ove Width (born 1939), Norwegian politician
  