Results 21 to 30 of about 889,165 (240)

Enforced hamiltonian cycles in generalized dodecahedra

open access: yesElectronic Journal of Graph Theory and Applications, 2013
The H-force number of a hamiltonian graph G is the smallest number k with the property that there exists a set W ⊆ V (G) with |W| = k such that each cycle passing through all vertices of W is a hamiltonian cycle.
Maria Timkova
doaj   +1 more source

Hamiltonian Cycles in T-Graphs [PDF]

open access: yesDiscrete & Computational Geometry, 2000
The vertices and polygonal edges of the planar Archimedean tiling \(3^6\) of the plane is called the triangular tiling graph (TTG). A subgraph \(G\) of TTG is linearly convex if, for every line \(L\) which contains an edge of TTG, the set \(L \cap G\) is a (possibly degenerated or empty) line segment.
John R. Reay, Tudor Zamfirescu
openaire   +3 more sources

The Traveling Salesman Problem for Cubic Graphs

open access: yesJournal of Graph Algorithms and Applications, 2007
We show how to find a Hamiltonian cycle in a graph of degree at most three with n vertices, in time O(2n/3) ≈ 1.260n and linear space. Our algorithm can find the minimum weight Hamiltonian cycle (traveling salesman problem), in the same time bound.
David Eppstein
doaj   +1 more source

A remark on Hamiltonian cycles

open access: yesJournal of Combinatorial Theory, Series B, 1981
AbstractEvery 2-connected graph G with δ ⩾ (v + κ)3 is hamiltonian where v denotes the order, δ the minimum degree and κ the point connectivity of G.
Roland Häggkvist, G. G. Nicoghossian
openaire   +1 more source

What do Eulerian and Hamiltonian cycles have to do with genome assembly?

open access: yesPLoS Computational Biology, 2021
Many students are taught about genome assembly using the dichotomy between the complexity of finding Eulerian and Hamiltonian cycles (easy versus hard, respectively).
Paul Medvedev, Mihai Pop
doaj   +1 more source

Numerical evidence for phase transitions of NP-complete problems for instances drawn from Lévy-stable distributions [PDF]

open access: yes, 2011
Random NP-Complete problems have come under study as an important tool used in the analysis of optimization algorithms and help in our understanding of how to properly address issues of computational intractability.
Connelly, Abram, Abram Connelly
core   +2 more sources

Second Hamiltonian Cycles in Claw-Free Graphs

open access: yesTheory and Applications of Graphs, 2015
Sheehan conjectured in 1975 that every Hamiltonian regular simple graph of even degree at least four contains a second Hamiltonian cycle. We prove that most claw-free Hamiltonian graphs with minimum degree at least 3 have a second Hamiltonian cycle and ...
Hossein Esfandiari   +3 more
doaj   +1 more source

Arc-Disjoint Hamiltonian Paths in Strong Round Decomposable Local Tournaments

open access: yesDiscussiones Mathematicae Graph Theory, 2021
Thomassen, [Edge-disjoint Hamiltonian paths and cycles in tournaments, J. Combin. Theory Ser. B 28 (1980) 142–163] proved that every strong tournament has a pair of arc-disjoint Hamiltonian paths with distinct initial vertices and distinct terminal ...
Meng Wei
doaj   +1 more source

Graphs with few hamiltonian cycles

open access: yesMathematics of Computation, 2019
We describe an algorithm for the exhaustive generation of non-isomorphic graphs with a given number k ≥
Goedgebeur, Jan   +2 more
openaire   +3 more sources

Limit cycles of planar piecewise linear Hamiltonian differential systems with two or three zones

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2022
In this paper, we study the existence of limit cycles in continuous and discontinuous planar piecewise linear Hamiltonian differential system with two or three zones separated by straight lines and such that the linear systems that define the piecewise ...
Claudio Pessoa, Ronisio Ribeiro
doaj   +1 more source

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