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Packing Trees into the Complete Graph

Published online by Cambridge University Press:  10 July 2002

EDWARD DOBSON
Affiliation:
Department of Mathematics and Statistics, PO Drawer MA, Mississippi State University, Mississippi State, MS 39762, USA (e-mail: dobson@math.msstate.edu)

Abstract

Let c [les ] 0.076122 and T1, T2,…, Tn be a sequence of trees such that [mid ]V(Ti)[mid ] [les ] ic(i−1). We prove that, if for each 1 [les ] i [les ] n there exists a vertex xiV(Ti) such that Tixi has at least (1−2c)(i−1) isolated vertices, then T1,…, Tn can be packed into Kn. We also prove that if T is a tree of order n+1−cn, c′ [les ] 1/25 (37−8 √21 ) ≈ 0.0135748, such that there exists a vertex xV(T) and Tx has at least n(1−2c′) isolated vertices, then 2n+1 copies of T may be packed into K2n+1.

Type
Research Article
Copyright
2002 Cambridge University Press

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