A moderate yield(55%)preparation ofN-1substituted thyminehasbeenachievedbyreacting an excess of 4-bromobutylacetate at 100 "C for 48 brs. N-1, N-3 bisall@atedand O-alkylated compounds werealsoobtained as by-products. 0 1997Published byElsevierScienceLtd.
An unexpected result in coding the vertices of a graph
โ Scribed by Melvin A Breuer; Jon Folkman
- Publisher
- Elsevier Science
- Year
- 1967
- Tongue
- English
- Weight
- 736 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0022-247X
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
This note can be treated a s a supplement to a paper written by Bollobas which was devoted to the vertices of a given degree in a random graph. We determine some values of the edge probability p for which the number of vertices of a given degree of a random graph G E ?An, p) asymptotically has a nor
Albertson, M.O. and D.M. Berman, The number of cut-vertices in a graph of given minimum degree, Discrete Mathematics 89 (1991) 97-100. A graph with n vertices and minimum degree k 2 2 can contain no more than (2k -2)n/(kz -2) cut-vertices. This bound is asymptotically tight. \* Research supported in
For a connected graph G, let ~-(G) be the set of all spanning trees of G and let nd(G) be the number of vertices of maximum degree in G. In this paper we show that if G is a cactus or a connected graph with p vertices and p+ 1 edges, then the set {na(T) : T C ~-(G)) has at most one gap, that is, it