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11 053 (0,091s) •

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Note on list star edge‐coloring of subcubic graphs

A star edge-coloring of a graph is a proper edge-coloring without bichromatic paths and cycles of length four. In this paper, we consider the list version of this coloring and prove that the list star chro...

Pure mathematics

  • 2019
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  • Jimp
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  • Link
Result

Star edge coloring of some classes of graphs

A star edge coloring of a graph is a proper edge coloring without bichromatic paths and cycles of length four. In this article, we establish tight upper bounds for trees and subcubic outerplanar graphs, and derive an upper ...

BA - Obecná matematika

  • 2016
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  • Jx
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  • Link
Result

On a star chromatic index of subcubic graphs

A star edge-coloring of a graph is a proper edge-coloring without bichromatic paths and cycles of length four. We consider the list version of this coloring and prove that the list star chromatic index of ...

Pure mathematics

  • 2017
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  • JSC
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  • Link
Result

Star Edge-Coloring of Square Grids

A star edge-coloring of a graph G is a proper edge-coloring without bichromatic paths and cycles of length four. The smallest integer k such that G admits a star edge-coloring with k colors is the...

Pure mathematics

  • 2021
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  • Jimp
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  • Link
Result

Parameters of galactic early B supergiants. The influence of the wind on the interstellar extinction determination

The interstellar extinction of stars is often derived from the observed color are weak enough to not influence the individual colors of the star. We investigate the influence of stellar winds to the observable ...

BN - Astronomie a nebeská mechanika, astrofyzika

  • 2009
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  • Jx
Result

Star Chromatic Index

The star chromatic index chi'_s(G) of a graph G is the minimum number of colors needed to properly color the edges of the graph so that no path or cycle of length four is bi-colored. We obtain a near-linear upper b...

BA - Obecná matematika

  • 2013
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  • Jx
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  • Link
Result

A complete bipartite graph without properly colored cycles of length four

The paper gives a global decomposition theorem for edge‐colorings of complete bipartite graphs without properly colored C4. As a corollary, a result on the existence of a monochromatic star is obtained....

Pure mathematics

  • 2020
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  • Jimp
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  • Link
Result

Lominous binary supersoft X-ray sources: optical colors and absolute magnitudes.

An analysis of the color indices and absolute magnitudes of the classical supersoft X-ray binary sources (SSXBs), the V Sge-type stars, the symbiotic SSXBs, and the classical novae in the soft X-ray phase is presented....

BN - Astronomie a nebeská mechanika, astrofyzika

  • 2003
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  • Jx
Result

Photometric Stromgren-H beta Quantification for O and B Stars of Luminosity Class V

and the intrinsic colors is fundamental for the photometric stellar classification the classification of reddened stars over the entire spectral sequence. However, a detailed to provide a new empirical tabulation of the intrinsic <...

Astronomy (including astrophysics,space science)

  • 2017
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  • Jimp
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  • Link
Result

Shaking the Pot of Modelling Tools: Some Open Problems in the Field

To inspire and provoke lively discussions, I argue that the accuracy of the basic physical properties of stars, based on analyses of well-observed detached binaries, might be worse than usually believed. I offer some ways how to deal with th...

BN - Astronomie a nebeská mechanika, astrofyzika

  • 2012
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  • D
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  • Link
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