Results 111 to 120 of about 3,086,920 (343)

Retracing Argument for Distance-Regular Graphs

open access: yesJournal of Combinatorial Theory, Series B, 2000
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +1 more source

Gravity‐Dependent Modulation of Downbeat Nystagmus: Insights From Velocity‐Storage Dysfunction

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Downbeat nystagmus varies with head position, a phenomenon termed gravity‐dependent modulation. We aimed to clarify its mechanism using a velocity‐storage model. Methods In 10 patients with downbeat nystagmus due to cerebellar disorders, we recorded eye movements at different pitch‐ and roll‐axis head positions.
Ji‐Hyung Park   +5 more
wiley   +1 more source

Cumulative Social Disadvantage and Disease Activity in Juvenile Idiopathic Arthritis: A Childhood Arthritis and Rheumatology Research Alliance Registry Study

open access: yesArthritis Care &Research, EarlyView.
Objective Social determinants of health (SDOH) contribute to juvenile idiopathic arthritis (JIA) disparities, but most studies have assessed SDOH independently rather than cumulatively across individual, family, and neighborhood levels. Using a socioecological framework, we investigated the relationship among cumulative social disadvantage ...
William Daniel Soulsby   +448 more
wiley   +1 more source

Spectral Characterization of the Hamming Graphs [PDF]

open access: yes
We show that the Hamming graph H(3; q) with diameter three is uniquely determined by its spectrum for q ¸ 36. Moreover, we show that for given integer D ¸ 2, any graph cospectral with the Hamming graph H(D; q) is locally the disjoint union of D copies of
Koolen, J.H., Bang, S., Dam, E.R. van
core  

Antimagic labeling of regular graphs

open access: yes, 2016
A graph G = (V, E ) is antimagic if there is a one-to-one correspondence f : E → {1, 2,..., |E|} such that for any two vertices u, v, Σe∈ E(u) f(e)≠Σe∈E(v ) f(e).
Feihuang Chang; Yu-Chang Liang; Zhishi Pan; Xuding Zhu
core   +1 more source

Mechanochemical Synthesis and Characterization of Nanostructured ErB4 and NdB4 Rare‐Earth Tetraborides

open access: yesAdvanced Engineering Materials, Volume 27, Issue 6, March 2025.
ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur   +5 more
wiley   +1 more source

On the distance eigenvalues of Cayley graphs

open access: yesپژوهش‌های ریاضی, 2022
In this paper, graphs are undirected and loop-free and groups are finite. By Cn, Kn and Km,n we mean the cycle graph with n vertices, the complete graph with n vertices and the complete bipartite graph with parts size m and n, respectively.
Majid Arezoomand
doaj  

Three New Distance-regular Graphs

open access: yesEuropean Journal of Combinatorics, 1993
We describe three new diameter 4 distance-regular triple covers of strongly regular graphs. The first two such covers are distance- transitive, with intersection arrays \{416,315,64,1;1,32,315,416\} and \{56,45,16,1;1,8,45,56\}. The third has intersection array \{32,27,8,1;1,4,27,32\}, but is not distance-transitive.
openaire   +3 more sources

Developments on Spectral Characterizations of Graphs [PDF]

open access: yes
In [E.R. van Dam and W.H. Haemers, Which graphs are determined by their spectrum?, Linear Algebra Appl. 373 (2003), 241-272] we gave a survey of answers to the question of which graphs are determined by the spectrum of some matrix associated to the graph.
Dam, E.R. van, Haemers, W.H.
core  

Distance degree regular graphs [PDF]

open access: yes, 1984
In this note, inequalities between the distance degrees of distance degree regular graphs and to characterize the graphs when one of the equalities holds are ...
Nomura, Kazumasa, Hilano, Teluhiko
core   +1 more source

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