نتایج جستجو برای: morphological characterization

تعداد نتایج: 493903  

Journal: :Journal of vector borne diseases 2015
A R Rajavel N Pradeep Kumar R Natarajan P Vanamail A Rathinakumar P Jambulingam

BACKGROUND & OBJECTIVES Culex tritaeniorhynchus (Diptera: Culicidae), an important vector of Japanese encephalitis belongs to the Culex vishnui subgroup which includes two other vector species namely, Cx. Vishnui and Cx. pseudovishnui. Many varieties and types of Cx. tritaeniorhynchus have been reported, besides populations that exhibit behavioural and biological differences. This study was und...

Journal: :CoRR 2013
Daniel Meister Udi Rotics

In the study of full bubble model graphs of bounded clique-width and bounded linear clique-width, we determined complete sets of forbidden induced subgraphs, that are minimal in the class of full bubble model graphs. In this note, we show that (almost all of) these graphs are minimal in the class of all graphs. As a corollary, we can give sets of minimal forbidden induced subgraphs for graphs o...

Journal: :Electronic Notes in Discrete Mathematics 2005
Andrei V. Gagarin Wendy J. Myrvold John Chambers

Forbidden minors and subdivisions for toroidal graphs are numerous. In contrast, the toroidal graphs with no K3,3’s have a nice explicit structure and short lists of obstructions. For these graphs, we provide the complete lists of four forbidden minors and eleven forbidden subdivisions.

Journal: :J. Comb. Theory, Ser. B 2001
Ilse Fischer Charles H. C. Little

A graph is 1-extendible if every edge has a 1-factor containing it. A 1-extendible non-bipartite graph G is said to be near bipartite if there exist edges e1 and e2 such that G − {e1, e2} is 1-extendible and bipartite. We characterise the Pfaffian near bipartite graphs in terms of forbidden subgraphs. The theorem extends an earlier characterisation of Pfaffian bipartite graphs.

Journal: :international journal of environmental research 0
f. amirlatifi department of biology, science and research branch, islamic azad university, tehran, iran n. soltani department of petroleum microbiology, research institute of applied science, acecr, tehran, iran s. saadatmand department of biology, science and research branch, islamic azad university, tehran, iran sh. shokravi department of biology, gorgan branch, islamic azad university, gorgan, iran m. dezfulian department of microbiology, karaj branch, islamic azad university, karaj, iran

in this research the effects of crude oil on morphological and physiological characterization ofthe cyanobacterium microchaete tenera isc13 were investigated. isolated cyanobacterium treated with different oil concentrations (control, 1, 2.5, 5 and 7%) in carbonless bg110 medium. morphological characteristics such as morphology of filament, cellular shapes and sizes, relative position of hetero...

1997
JOHN R. STEMBRIDGE

We analyze the structure of reduced expressions in the Coxeter groups An, Bn and Dn. Several special classes of elements are singled out for their connections with symmetric functions or the theory of P -partitions. Membership in these special classes is characterized in a variety of ways, including forbidden patterns, forbidden subwords, and by the form of canonically chosen reduced words.

Journal: :Australasian J. Combinatorics 2008
Yusuf Civan

We introduce and study a class of simplicial complexes, the orphan complexes, associated to simple graphs whose family of (open or closed) vertex-neighborhoods are anti-Sperner. Under suitable restrictions, we show that orphan complexes of such graphs are always shellable and provide a characterization of graphs in terms of induced forbidden subgraphs contained in this restricted subfamily.

Journal: :CoRR 2018
Jan Bok Jana Maxová

In this paper we demonstrate that several theorems from [1] and [3] do not hold as they are stated. These are the theorems regarding forbidden subposet characterizations of certain classes of coverincomparability graphs. In this paper we correct a mistake in the main theorem of [1], reformulate the corresponding statements and present corrected proofs. We further characterize posets whose cover...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید