In graph theory, a tree decomposition is a mapping of a graph into a tree that can be used to define the treewidth of the graph and speed up solving certain...
12 KB (1,537 words) - 04:11, 25 September 2024
method, the hypertree decomposition, uses a different measure. Either way, the width of a decomposition is defined so that decompositions of size bounded by...
43 KB (5,804 words) - 06:51, 26 January 2025
Treewidth (redirect from Tree-width)
equivalent ways: in terms of the size of the largest vertex set in a tree decomposition of the graph, in terms of the size of the largest clique in a chordal...
42 KB (4,569 words) - 23:52, 13 March 2025
Quadtree (redirect from Quadtree decomposition)
bucket splits. The tree directory follows the spatial decomposition of the quadtree. A tree-pyramid (T-pyramid) is a "complete" tree; every node of the...
34 KB (4,712 words) - 16:58, 12 March 2025
algorithm works on the tree decomposition. In general, a constraint satisfaction problem can be solved by first creating a tree decomposition and then using a...
7 KB (1,041 words) - 22:14, 8 March 2022
Pathwidth (redirect from Path Decomposition)
path-decomposition is a tree decomposition (X,T) in which the underlying tree T of the decomposition is a path graph. The width of a path-decomposition is...
66 KB (7,684 words) - 15:08, 5 March 2025
decomposition, decomposition of ideals into primary ideals Tree decomposition, homomorphism of a graph to a tree Vector decomposition, decomposition of vectors...
3 KB (409 words) - 22:09, 6 February 2025
theory, a branch-decomposition of an undirected graph G is a hierarchical clustering of the edges of G, represented by an unrooted binary tree T with the edges...
21 KB (2,449 words) - 02:47, 16 March 2025
property that is held by all cards). decomposition See tree decomposition, path decomposition, or branch-decomposition. degenerate degeneracy A k-degenerate...
109 KB (16,011 words) - 18:32, 30 April 2025
theory, including the interplay among graph minors, matroid theory, tree decomposition, and infinite graphs. He holds the chair of discrete mathematics at...
4 KB (402 words) - 09:15, 20 October 2024
decomposition (also called heavy path decomposition) is a technique for decomposing a rooted tree into a set of paths. In a heavy path decomposition,...
9 KB (1,017 words) - 03:38, 5 October 2024
represented by the subtree of the tree decomposition descending from that bag. When G has bounded treewidth, it has a tree decomposition in which all bags have bounded...
25 KB (3,146 words) - 20:27, 1 April 2025
Clique-sum (redirect from Seymour's decomposition theorem)
as the decomposition of chordal graphs or strangulated graphs, no edges should be removed. In other contexts, such as the SPQR-tree decomposition of graphs...
10 KB (1,178 words) - 04:08, 25 September 2024
In linear algebra, a QR decomposition, also known as a QR factorization or QU factorization, is a decomposition of a matrix A into a product A = QR of...
30 KB (5,100 words) - 00:34, 9 May 2025
Chordal graph (redirect from Decomposable graph)
forms a tree decomposition of the graph, with treewidth equal to one less than the size of the largest clique in the graph; the tree decomposition of any...
19 KB (2,164 words) - 07:51, 18 July 2024
graph. That is, a branch-decomposition may be viewed as a hierarchical clustering of the edges of the graph. Branch-decompositions and an associated numerical...
14 KB (1,971 words) - 05:59, 2 June 2025
them. Decomposition relies on chemical processes similar to digestion in animals; in fact, many sources use the words digestion and decomposition interchangeably...
12 KB (1,388 words) - 07:30, 9 June 2025
sequence is taken to be a cycle. An open ear decomposition or a proper ear decomposition is an ear decomposition in which the two endpoints of each ear after...
15 KB (1,904 words) - 22:28, 18 February 2025
Arborescence (graph theory) (redirect from Arboreal decomposition)
including directed rooted tree, out-arborescence, out-tree, and even branching being used to denote the same concept. Rooted tree itself has been defined...
7 KB (782 words) - 13:14, 4 April 2025
separator hierarchy which may take the form of either a tree decomposition or a branch-decomposition of the graph. Separator hierarchies may be used to devise...
73 KB (10,072 words) - 06:45, 12 May 2025
decomposition. Decomposition can be a gradual process for organisms that have extended periods of dormancy. One can differentiate abiotic decomposition from biotic...
59 KB (6,552 words) - 20:58, 11 June 2025
easily derive a logarithmic upper bound on the tree-depth. The same technique, applied to a tree decomposition of a graph, shows that, if the treewidth of...
21 KB (2,817 words) - 08:49, 16 July 2024
of decomposition techniques could be used in order to decrease the size of an equation set: decomposition-recombination planning algorithms, tree decomposition...
12 KB (1,290 words) - 09:06, 14 May 2024
In graph theory, the modular decomposition is a decomposition of a graph into subsets of vertices called modules. A module is a generalization of a connected...
22 KB (3,177 words) - 10:54, 2 April 2024
structures underlying the SPQR tree, the triconnected components of a graph, and the connection between this decomposition and the planar embeddings of...
13 KB (1,853 words) - 12:52, 5 July 2024
different use of 'tangle' appears in Graph minors X. Obstructions to tree-decomposition by N. Robertson and P. D. Seymour, Journal of Combinatorial Theory...
8 KB (987 words) - 07:54, 26 February 2025
a tree decomposition of an undirected graph, one less than the size of the largest vertex-set in the decomposition. Width of a path decomposition of...
2 KB (309 words) - 10:21, 29 March 2024
Split (graph theory) (redirect from Split decomposition)
into a tree-like structure called the split decomposition or join decomposition, which can be constructed in linear time. This decomposition has been...
10 KB (1,328 words) - 00:18, 8 November 2023
Graph structure theorem (section Tree width)
of the graphs in H is planar, then every H-minor-free graph has a tree decomposition of bounded width; equivalently, it can be represented as a clique-sum...
25 KB (2,783 words) - 11:45, 18 March 2025