Results 301 to 310 of about 520,977 (330)

Perfect Graphs and Comparability Graphs

2016
The first use of graph theory is dated to 1735. Swiss mathematician and physicist, Leonhard Euler, formulated theorems and definitions related to graphs. Euler was inspired by a real problem regarding crossing bridges in Konigsberg (east Prussia, also known as Krolewiec, Kaliningrad).
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Matching-perfect and cover-perfect graphs

Israel Journal of Mathematics, 1974
It is shown that a graphG has all matchings of equal size if and only if for every matching setλ inG, G\V(λ) does not contain a maximal open path of odd length greater than one, which is not contained in a cycle. (V(λ) denotes the set of vertices incident with some edge ofλ.) Subsequently edge-coverings of graphs are discussed.
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Perfect and precisely perfect fuzzy graphs

NAFIPS 2008 - 2008 Annual Meeting of the North American Fuzzy Information Processing Society, 2008
In this paper, we consider two different definitions of adjacency in fuzzy graph. Thus any graph theory concept that can be defined through adjacency can have two different variations in fuzzy graph theory. We demonstrate this fact through perfect graph and perfect graph theorem.
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Perfection of glued graphs of perfect original graphs

A graph G is perfect if the chromatic number and the clique number have the same value for every of its induced subgraph. A glued graph results from combining two vertex-disjoint graphs by identifying nontrivial connected isomorphic subgraphs of both graphs. Such subgraphs are referred to as the clones.
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Fundamentals and developments in fluorescence-guided cancer surgery

Nature Reviews Clinical Oncology, 2021
Friso Achterberg, Aimen Zlitni, Merlijn Hutteman   +2 more
exaly  

A guide to comprehensive phosphor discovery for solid-state lighting

Nature Reviews Materials, 2023
Shruti Hariyani, Małgorzata Sójka, Jakoah Brgoch   +2 more
exaly  

A perfect storm: How tumor biology, genomics, and health care delivery patterns collide to create a racial survival disparity in breast cancer and proposed interventions for change

Ca-A Cancer Journal for Clinicians, 2015
Bobby Daly, Olufunmilayo I Olopade
exaly  

Perfect graphs

1980
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Coherent perfect absorbers: linear control of light with light

Nature Reviews Materials, 2017
Denis G Baranov, Alex Krasnok, Timur O Shegai   +2 more
exaly  

Virtually Perfect? Telemedicine for Covid-19

New England Journal of Medicine, 2020
Brendan G Carr
exaly