Results 191 to 200 of about 2,825 (206)

Optimal Parallel Algorithms for Straight-Line Grid Embeddings of Planar Graphs

open access: closedSIAM Journal on Discrete Mathematics, 1994
A straight-line grid embedding of a planar graph is a drawing of the graph on a plane where the vertices are located at grid points and the edges are represented by nonintersecting segments of straight, lines joining their incident vertices. Given an n-vertex embedded planar graph with $n \geq 3$, a straight-line embedding on a grid of size $( n - 2 ) \
Ming‐Yang Kao   +3 more
openalex   +3 more sources

Tri-Edge-Connectivity Augmentation for Planar Straight Line Graphs

open access: closed, 2009
It is shown that if a planar straight line graph (Pslg) with n vertices in general position in the plane can be augmented to a 3-edge-connected Pslg, then 2n ? 2 new edges are enough for the augmentation. This bound is tight: there are Pslgs with n ? 4 vertices such that any augmentation to a 3-edge-connected Pslg requires 2n ? 2 new edges.
Marwan Al-Jubeh   +4 more
openalex   +3 more sources

Straight Line Representations of Infinite Planar Graphs

open access: closedJournal of the London Mathematical Society, 1977
Carsten Thomassen
openalex   +3 more sources

Acute Constraints in Straight-Line Drawings of Planar Graphs

open access: closedIEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2019
Seto Akane   +3 more
openalex   +3 more sources

Augmenting the Edge Connectivity of Planar Straight Line Graphs to Three

Algorithmica, 2011
We characterize the planar straight line graphs (Pslgs) that can be augmented to 3-connected and 3-edge-connected Pslgs, respectively. We show that if a Pslg with n vertices can be augmented to a 3-edge-connected Pslg, then at most 2n−2 new edges are always sufficient and sometimes necessary for the augmentation.
Mashhood Ishaque   +5 more
openaire   +1 more source

Constrained Tri-Connected Planar Straight Line Graphs

2012
It is known that for any set V of n ≥ 4 points in the plane, not in convex position, there is a 3-connected planar straight line graph G = (V, E) with at most 2n − 2 edges, and this bound is the best possible. We show that the upper bound | E | ≤ 2n continues to hold if G = (V, E) is constrained to contain a given graph G 0 = (V, E 0), which is either ...
Csaba D. Tóth   +7 more
openaire   +2 more sources

Area-Thickness Trade-Offs for Straight-Line Drawings of Planar Graphs

The Computer Journal, 2016
DI GIACOMO, Emilio   +3 more
openaire   +2 more sources

Acute Constrains in Straight-Line Drawings of Planar Graphs

open access: closed, 2017
Seto Akane   +2 more
openalex  

Home - About - Disclaimer - Privacy