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A note of the extension on MMPI configural rules

✍ Scribed by Theodore F. Henrichs

Publisher
John Wiley and Sons
Year
1966
Tongue
English
Weight
172 KB
Volume
22
Category
Article
ISSN
0021-9762

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A note on possible extensions of Negami'
A note on possible extensions of Negami's conjecture
✍ Hlin?nοΏ½, Petr πŸ“‚ Article πŸ“… 1999 πŸ› John Wiley and Sons 🌐 English βš– 239 KB πŸ‘ 1 views

A graph H is a cover of a graph G, if there exists a mapping Ο• from V (H) onto V (G) such that for every vertex v of G, Ο• maps the neighbors of v in H bijectively onto the neighbors of Ο•(v) in G. Negami conjectured in 1987 that a connected graph has a finite planar cover if and only if it embeds in