HLINĚNÝ, Petr. New infinite families of almost-planar crossing-critical graphs. Electronic Journal of Combinatorics. internet: -, 2008, vol. 15, No 1, p. R102, 12 pp. ISSN 1077-8926.
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Basic information
Original name New infinite families of almost-planar crossing-critical graphs
Name in Czech Nové nekonečné třídy téměř planárních průsečíkově kritických grafů
Authors HLINĚNÝ, Petr (203 Czech Republic, guarantor).
Edition Electronic Journal of Combinatorics, internet, - 2008, 1077-8926.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10101 Pure mathematics
Country of publisher United States of America
Confidentiality degree is not subject to a state or trade secret
WWW online paper
Impact factor Impact factor: 0.586
RIV identification code RIV/00216224:14330/08:00025241
Organization unit Faculty of Informatics
UT WoS 000258122700003
Keywords in English crossing-critical; graph
Tags crossing-critical, graph
Tags International impact, Reviewed
Changed by Changed by: prof. RNDr. Petr Hliněný, Ph.D., učo 168881. Changed: 1/6/2009 13:06.
Abstract
We show that, for all choices of integers $k>2$ and $m$, there are simple $3$-connected $k$-crossing-critical graphs containing more than $m$ vertices of each even degree $\leq2k-2$. This construction answers one half of a question raised by Bokal, while the other half asking analogously about vertices of odd degrees at least $7$ in crossing-critical graphs remains open. Furthermore, our newly constructed graphs have several other interesting properties; for instance, they are almost planar and their average degree can attain any rational value in the interval $\big[3+\frac15,6-\frac8{k+1}\big)$.
Abstract (in Czech)
Ukážeme konstrukci jednoduchých 3-souvislých k-průsečíkově kritických grafů, které obsahují libovolně mnoho vrcholů sudých stupňů <=2k-2 pro všechna k>2. Tato konstrukce zodpovídá jednu polovinu otázky Bokala a má několik dalších zajímavých aplikací.
Links
GA201/08/0308, research and development projectName: Využití strukturálních a "šířkových" parametrů v kombinatorice a algoritmické složitosti
Investor: Czech Science Foundation, Utilization of Structural and Width Parametres in Combinatorics and Algorithmic Complexity
1M0545, research and development projectName: Institut Teoretické Informatiky
Investor: Ministry of Education, Youth and Sports of the CR, Institute for Theoretical Computer Science
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