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7 678 (0,11s) •

Výsledek výzkumu

l-facial edge colorings of graphs

It is conjectured that 3l+1 colors suffice for an l-facial edge coloring of any plane graph. We prove that 7 colors suffice for a 2-facial edge coloring of any plane graph and therefore we confirm...

BA - Obecná matematika

  • 2015
    • •
  • Jx
    • •
  • Odkaz
Výsledek výzkumu

Cyclic, diagonal and facial coloring

We introduce a new notion of facial coloring and use it to improve the upper bound on 1-diagonal coloring of planar quadrangulations....

BA - Obecná matematika

  • 2005
    • •
  • Jx
Výsledek výzkumu

Facial colorings using Hall's Theorem

We improve known upper bounds of the facial chromatic number using Hall's theorem.

BA - Obecná matematika

  • 2010
    • •
  • Jx
Výsledek výzkumu

3-facial colouring of plane graphs

We prove that every plane graph has a 3-facial coloring using at most 11 colors.

BA - Obecná matematika

  • 2008
    • •
  • Jx
Výsledek výzkumu

Cyclic, diagonal and facial colorings - a missing case

We provide a proof for the case missing in our original paper on the topic.

BA - Obecná matematika

  • 2007
    • •
  • Jx
Výsledek výzkumu

Sexual Dimorphism in Facial Contrast: A Case from Central Africa

Apart from morphological differences, male and female faces also vary in color, especially in overall lightness and facial contrast, i.e., the contrast between the luminance and color of facial features (eyes, lips...

Biology (theoretical, mathematical, thermal, cryobiology, biological rhythm), Evolutionary biology

  • 2021
    • •
  • Jimp
    • •
  • Odkaz
Výsledek výzkumu

Cyclic colorings of plane graphs with independent faces

We show that every planar graph with vertex disjoint faces of size four or more has a vertex coloring with D+1 colors, where is the maximum face size, such that no face is incident with two vertices of the same color....

BA - Obecná matematika

  • 2012
    • •
  • Jx
    • •
  • Odkaz
Výsledek výzkumu

Automatic Hair Color De-identification

hair color de-identification method working with video records with frontal facial view. The proposed method allows mutual conversion of hair color between five basic colors (black, brown, blonde, red, grey/white)...

Electrical and electronic engineering

  • 2015
    • •
  • D
    • •
  • Odkaz
Výsledek výzkumu

Comparative Analysis of Facial Coloration between Introduced and Source Populations of the Red Wood Ant Formica paralugubris

compared the differences between the facial coloration of sixty-year-old imported we discuss, the facial coloration is overall similar between introduced-population variability suggests that facial co...

Entomology

  • 2022
    • •
  • Jimp
    • •
  • Odkaz
Výsledek výzkumu

African and European perception of African female attractiveness

to variations in both facial morphology and local standards of beauty. We investigated the relative contribution of four facial markers of attractiveness based on 101 female facial portraits (standardized, non-manipulated)...

Zoology

  • 2017
    • •
  • Jimp
    • •
  • Odkaz
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