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Graphs without K4 and well-quasi-ordering

✍ Scribed by Robin Thomas


Book ID
103506147
Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
362 KB
Volume
38
Category
Article
ISSN
0095-8956

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πŸ“œ SIMILAR VOLUMES


Subgraphs and well-quasi-ordering
✍ Guoli Ding πŸ“‚ Article πŸ“… 1992 πŸ› John Wiley and Sons 🌐 English βš– 712 KB

## Abstract Let 𝒴 be a class of graphs and let βͺ― be the subgraph or the induced subgraph relation. We call βͺ― an __ideal__ (with respect to βͺ―) if βͺ― implies that βͺ―. In this paper, we study the ideals that are well‐quasiordered by βͺ―. The following are our main results. If βͺ― is the subgraph relation, w

Well-quasi-ordering and the Hausdorff qu
✍ Hans-Peter A. KΓΌnzi; Salvador Romaguera πŸ“‚ Article πŸ“… 1998 πŸ› Elsevier Science 🌐 English βš– 863 KB

Let (X.U) be a quasi-uniform space and M, its Hausdorff quasi-uniformity defined on the collection PO(X) of all nonempty subsets of X. We show that (PO(X). U,) is compact if and only if (X.U) is compact and (X,,U-'IX,,) is hereditarily precompact where X,,, = {y E X: y is minimal in the (specializa