A note on perfect Gaussian elimination
β Scribed by Martin Charles Golumbic
- Publisher
- Elsevier Science
- Year
- 1978
- Tongue
- English
- Weight
- 133 KB
- Volume
- 64
- Category
- Article
- ISSN
- 0022-247X
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
## Ε½ . B which take constant non-zero Β¨alues on p-singular elements. 1 Furthermore, it is always possible to modify the perfect isometry so that it sends the trivial character of H to the trivial character of G.
Perfectly orderable graphs were introduced by Chvfital in 1984. Since then, several classes of perfectly orderable graphs have been identified. In this paper, we establish three new results on perfectly orderable graphs. First, we prove that every graph with Dilworth number at most three has a simpl
## Abstract __Ki__βperfect graphs are a special instance of __F β G__ perfect graphs, where __F__ and __G__ are fixed graphs with __F__ a partial subgraph of __G.__ Given __S__, a collection of __G__βsubgraphs of graph __K__, an __F β G__ cover of __S__ is a set of __T__ of __F__βsubgraphs of __K__
In this paper we explore the c:oncept of factoring a graph into non-isomorphic paths. Lel Pi denote the path of length i. We SAY that a graph G having $n(n + 1) edges is path-perfect if E( G) can be partitioned as E, UE, !J l \* l U & such that the subgraph of G induced by 32i is isomorphic to Pr, f
In this paper we introduce and analyse a new Schur complement approximation based on incomplete Gaussian elimination. The approximate Schur complement is used to develop a multigrid method. This multigrid method has an algorithmic structure that is very similar to the algorithmic structure of classi