Results 91 to 100 of about 57,717 (241)

L(2, 1)-Labelings of Some Families of Oriented Planar Graphs

open access: yesDiscussiones Mathematicae Graph Theory, 2014
In this paper we determine, or give lower and upper bounds on, the 2-dipath and oriented L(2, 1)-span of the family of planar graphs, planar graphs with girth 5, 11, 16, partial k-trees, outerplanar graphs and cacti.
Sen Sagnik
doaj   +1 more source

Low Density Parity Check Codes Constructed from Hankel Matrices

open access: yesJournal of Telecommunications and Information Technology, 2018
In this paper, a new technique for constructing low density parity check codes based on the Hankel matrix and circulant permutation matrices is proposed. The new codes are exempt of any cycle of length 4.
Mohammed Amine Tehami
doaj   +1 more source

On Regular Hypergraphs of High Girth [PDF]

open access: yesThe Electronic Journal of Combinatorics, 2014
We give lower bounds on the maximum possible girth of an $r$-uniform, $d$-regular hypergraph with at most $n$ vertices, using the definition of a hypergraph cycle due to Berge. These differ from the trivial upper bound by an absolute constant factor (viz., by a factor of between $3/2+o(1)$ and $2 +o(1)$).
ELLIS, DC, Linial, N
openaire   +3 more sources

Light Graphs In Planar Graphs Of Large Girth

open access: yesDiscussiones Mathematicae Graph Theory, 2016
A graph H is defined to be light in a graph family 𝒢 if there exist finite numbers φ(H, 𝒢) and w(H, 𝒢) such that each G ∈ 𝒢 which contains H as a subgraph, also contains its isomorphic copy K with ΔG(K) ≤ φ(H, 𝒢) and ∑x∈V(K) degG(x) ≤ w(H, 𝒢).
Hudák Peter   +3 more
doaj   +1 more source

Scan posture definition and hip girth measurement: the impact on clothing design and body scanning

open access: yesErgonomics, 2017
Ergonomic measurement is central to product design and development; especially for body worn products and clothing. However, there is a large variation in measurement definitions, complicated by new body scanning technology that captures measurements in ...
S. Gill, C. Parker
semanticscholar   +1 more source

The Relationship Between Stature and Live Weight of Dairy Cows Between Birth and Maturity

open access: yesRuminants
Lactational and reproductive performance are strongly associated with cow live weight and capacity. However, there are limited data published describing capacity (thoracic) growth and the prediction of final stature and capacity from measurements at ...
Michaela J. Gibson   +5 more
doaj   +1 more source

On the girth of Tanner (3,7) quasi-cyclic LDPC codes [PDF]

open access: yesTransactions on Combinatorics, 2012
S. Kim, et al, have been analyzed the girth of some algebraically structured quasi-cyclic (QC) low-density parity-check (LDPC) codes, i.e. Tanner (3,5) of length 5p, where p is a prime of the form 15m+1. In this paper, by extension this method to Tanner (
Mohammad Gholami   +1 more
doaj  

Abelian girth and gapped sheaves [PDF]

open access: yes, 2016
The girth of a graph is the length of the shortest cycle in a graph, and the abelian girth of a graph is the girth of the graph's universal abelian covering graph. We denote the abelian girth of a graph G as Abl(G) and show that for d-regular graphs on n
Izsak, Alice
core  

Note on the girth of Ramanujan graphs [PDF]

open access: yes, 1990
The purpose of this note is to establish an upper bound for the girth of the Ramanujan graphs constructed by Lubozky, Phillips, and Sarnak, thereby determining the asymptotic behaviour of the girth of these ...
Boshier, A.G, Biggs, N.L
core   +1 more source

Super-reflexivity and the girth of spheres [PDF]

open access: yes, 2018
It is shown that a Banach space is super-reflexive if and only if the girth of its unit ball is greater than 4. Consequently, "girth greater than 4" is a property preserved under isomorphisms and duality.
Juan Schaffer (3887734)   +1 more
core   +1 more source

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