Results 241 to 250 of about 408,826 (276)

Fractional pyramids for color image segmentation

Proceeding of Southwest Symposium on Image Analysis and Interpretation, 2002
We describe a pyramid structure introduced by Burt (1981) called fractional pyramid. That structure is based on the rigid Gaussian pyramid. In such a structure the reduction factor between two level is given by a fraction k/sub 1//k/sub 2/. This presents the advantage of increasing the number of levels, and slows the loss of information during the ...
V. Lozano, B. Laget
openaire   +1 more source

Colored monopoles, Cheshire color, and unconfined fractional electric charge

Physical Review D, 1994
Stable magnetic monopoles formed in phase transitions in the early Universe in general carry colored as well as ordinary (electromagnetic) magnetic charge. We argue that isolated quarks can induce a ``Cheshire'' color electric charge on such monopoles and form colorless finite energy quark-monopole bound states which will exhibit unconfined fractional ...
openaire   +2 more sources

Fractional colorings with large denominators

Journal of Graph Theory, 1995
AbstractThe m‐chromatic number χm(G) of a graph G is the fewest colors needed so each node has m colors and no color appears on adjacent nodes. The fractional chromatic number is χ*(G)=limm→∞χm(G)/m. Let m(G) be the least m so that χ* (G) = χm(G)/m.
openaire   +1 more source

FRACTIONAL CHARGED COLOR SINGLET STATES AND STRING UNIFICATION

Modern Physics Letters A, 1992
The question of whether contributions of exotic multiplets of the gauge group to the running of gauge coupling constants from the string scale to low energy can lead to consistency with the precision low energy values of gauge couplings is discussed for theories with SO(6)×SO(4), SU(3)×SU(3)×SU(3) and flipped SU(5)×U(1) grand unification.
Bailin, David, Love, Alex
openaire   +2 more sources

Fractionally Charged Color Singlets

1982
Larue, Phillips, and Fairbank have reported the observation of excess charges ±1/3 e on cold Nb spheres1,2. Since every schoolboy now knows that color is permanently confined (except perhaps at the very high temperatures of the early universe), this observation implies the existence of a new kind of particle, a fractionally charged color singlet which ...
openaire   +1 more source

Fractional coloring problem of 1-planar graphs without short cycles

Discret. Math. Algorithms Appl., 2023
Meng-jiao Li, Lei Sun, Wei Zheng
semanticscholar   +1 more source

Fuzzy fractional coloring of fuzzy graph with its application

Journal of Ambient Intelligence and Humanized Computing, 2020
Tanmoy Mahapatra, G. Ghorai, M. Pal
semanticscholar   +2 more sources

A Customized SAT-based Solver for Graph Coloring

arXiv.org
We introduce ZykovColor, a novel SAT-based algorithm to solve the graph coloring problem working on top of an encoding that mimics the Zykov tree. Our method is based on an approach of H\'ebrard and Katsirelos (2020) that employs a propagator to enforce ...
Timo Brand, Daniel Faber, Stephan Held, Petra Mutzel   +3 more
semanticscholar   +1 more source

Fractional Chromatic Numbers from Exact Decision Diagrams

arXiv.org
Recently, Van Hoeve proposed an algorithm for graph coloring based on an integer flow formulation on decision diagrams for stable sets. We prove that the solution to the linear flow relaxation on exact decision diagrams determines the fractional ...
Timo Brand, Stephan Held
semanticscholar   +1 more source

Fractional Chern insulators in magic-angle twisted bilayer graphene

Nature, 2021
Yonglong Xie, Jeong Min Park, Daniel E Parker   +2 more
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