Results 31 to 40 of about 587,547 (217)

Complexity of Hamiltonian Cycle Reconfiguration

open access: yesAlgorithms, 2018
The Hamiltonian cycle reconfiguration problem asks, given two Hamiltonian cycles C 0 and C t of a graph G, whether there is a sequence of Hamiltonian cycles C 0 , C 1 , … , C t such that C i can be obtained ...
Asahi Takaoka
doaj   +1 more source

Representations of Edge Intersection Graphs of Paths in a Tree [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2005
Let $\mathcal{P}$ be a collection of nontrivial simple paths in a tree $T$. The edge intersection graph of $\mathcal{P}$, denoted by EPT($\mathcal{P}$), has vertex set that corresponds to the members of $\mathcal{P}$, and two vertices are joined by an ...
Martin Charles Golumbic   +2 more
doaj   +1 more source

Several results on chordal bipartite graphs [PDF]

open access: yes, 1997
summary:The question of generalizing results involving chordal graphs to similar concepts for chordal bipartite graphs is addressed. First, it is found that the removal of a bisimplicial edge from a chordal bipartite graph produces a chordal bipartite ...
Bono, Aaron, Bakonyi, Mihály
core   +1 more source

Minimum Eccentricity Shortest Paths in some Structured Graph Classes

open access: yesJournal of Graph Algorithms and Applications, 2016
We investigate the Minimum Eccentricity Shortest Path problem in some structured graph classes. It asks for a given graph to find a shortest path with minimum eccentricity.
Feodor Dragan, Arne Leitert
doaj   +1 more source

On the multipacking number of grid graphs [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2019
In 2001, Erwin introduced broadcast domination in graphs. It is a variant of classical domination where selected vertices may have different domination powers. The minimum cost of a dominating broadcast in a graph $G$ is denoted $\gamma_b(G)$.
Laurent Beaudou, Richard C. Brewster
doaj   +1 more source

The square of a chordal graph [PDF]

open access: yes, 1994
We introduce the closed-neighborhood intersection multigraph as a useful multigraph version of the square of a graph. We characterize those multigraphs which are squares of chordal graphs and include an algorithm to go from the squared chordal graph back
Harary, Frank, McKee, Terry A.
core   +1 more source

The Simultaneous Representation Problem for Chordal, Comparability and Permutation Graphs

open access: yesJournal of Graph Algorithms and Applications, 2012
We introduce a notion of simultaneity for any class of graphs with an intersection representation (interval graphs, chordal graphs, etc.) and for comparability graphs, which are represented by transitive orientations.
Krishnam Raju Jampani, Anna Lubiw
doaj   +1 more source

A Magneto‐Mechanically Activated Nerve Guidance Conduit Promotes Peripheral Nerve Regeneration via TIMP1‐Mediated Membrane Tension Transfer

open access: yesAdvanced Functional Materials, EarlyView.
This study presents a magneto‐mechanical strategy that incorporates FP@MSCs into an aligned PCL/GelMA nerve guidance conduit. Magnetic stimulation increases membrane tension in FP@MSCs, triggering cytoskeletal remodeling, Schwann cell‐like differentiation, and TIMP1 secretion. TIMP1 activates ITGB1/CD63–FAK signaling in NE‐4C cells, increasing membrane
Xinyu Zhu   +14 more
wiley   +1 more source

Graph Decompositions and Factorizing Permutations [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2002
A factorizing permutation of a given graph is simply a permutation of the vertices in which all decomposition sets appear to be factors. Such a concept seems to play a central role in recent papers dealing with graph decomposition. It is applied here for
Christian Capelle   +2 more
doaj   +3 more sources

Engineered Microvascular Model of the Blood–Brain–Tumor Barrier Reveals Endothelial Remodeling in Diffuse Midline Glioma

open access: yesAdvanced Healthcare Materials, EarlyView.
We developed a patient‐derived, functional microfluidic model of the diffuse midline glioma (DMG) blood–brain–tumor barrier (BBTB) comprised of endothelial cells, astrocytes, pericytes, and tumor cells. The system forms perfusable microvasculature, reveals the BBTB retains vascular integrity, identifies DMG‐specific transcriptomic changes distinct from
Kimberly R. Bennett   +7 more
wiley   +1 more source

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