Title
A short proof of a result of Pollak on Steiner minimal trees
Abstract
The long-standing conjecture of Gilbert and Pollak states that for any set of n given points in the euclidean plane, the ratio of the length of a Steiner minimal tree and the length of a minimal (spanning) tree is at least 32. This conjecture was shown to be true for n = 3 by Gilbert and Pollak, and for n = 4 by Pollak. However, the proof for n = 4 by Pollak is sufficiently complicated that no generalization to any other value of n has been found. We use a different approach to give a very short proof for the n = 4 case. This approach also allows us to attack the n = 5 case, though the proof is no longer short (to be reported in a subsequent paper).
Year
DOI
Venue
1982
10.1016/0097-3165(82)90056-5
Journal of Combinatorial Theory, Series A
Field
DocType
Volume
Discrete mathematics,Combinatorics,Euclidean geometry,Conjecture,Mathematics
Journal
32
Issue
ISSN
Citations 
3
0097-3165
14
PageRank 
References 
Authors
15.66
1
3
Name
Order
Citations
PageRank
D.-Z. Du121952.53
E.Y Yao22723.85
F. K. Hwang3332100.54