Title
Many touchings force many crossings
Abstract
Given n continuous open curves in the plane, we say that a pair is touching if they have finitely many interior points in common and at these points the first curve does not get from one side of the second curve to its other side. Otherwise, if the two curves intersect, they are said to form a crossing pair. Let t and c denote the number of touching pairs and crossing pairs, respectively. We prove that c≥1105t2n2, provided that t≥10n. Apart from the values of the constants, this result is best possible.
Year
DOI
Venue
2019
10.1016/j.jctb.2018.12.002
Journal of Combinatorial Theory, Series B
Keywords
DocType
Volume
Planar curve,Touching,Crossing
Journal
137
ISSN
Citations 
PageRank 
0095-8956
0
0.34
References 
Authors
0
2
Name
Order
Citations
PageRank
János Pach12366292.28
Géza Tóth258155.60