Results 21 to 30 of about 67,270 (298)

Automatic Continuity of Dense Range Homomorphisms into Multiplicatively Semisimple Complete Normed Algebras [PDF]

open access: yesمجلة التربية والعلم, 2014
The following open problem state that: If  is a dense range homomorphism from Banach algebra into Banach algebra  such that  is semisimple. Is  automatically continuous?
RUQAYAH BALO
doaj   +1 more source

Some sufficient conditions on hamilton graphs with toughness

open access: yesFrontiers in Computational Neuroscience, 2022
Let G be a graph, and the number of components of G is denoted by c(G). Let t be a positive real number. A connected graph G is t-tough if tc(G − S) ≤ |S| for every vertex cut S of V(G). The toughness of G is the largest value of t for which G is t-tough,
Gaixiang Cai   +4 more
doaj   +1 more source

Cliques and the spectral radius

open access: yesJournal of Combinatorial Theory, Series B, 2007
We present a number of relations involving the number of cliques in a graph and its spectral radius.
Béla Bollobás, Vladimir Nikiforov 0001
openaire   +2 more sources

On the Distance Spectral Radius of Trees with Given Degree Sequence

open access: yesDiscussiones Mathematicae Graph Theory, 2020
We consider the problem of maximizing the distance spectral radius and a slight generalization thereof among all trees with some prescribed degree sequence.
Dadedzi Kenneth   +2 more
doaj   +1 more source

On the Joint Spectral Radius

open access: yes, 2022
minor additions, 15 pages, to be submitted to a Springer volume in memory of Jean ...
openaire   +2 more sources

On the joint spectral radius. II [PDF]

open access: yesProceedings of the American Mathematical Society, 1992
In this paper we show that if T =
Chō, Muneo   +2 more
openaire   +2 more sources

Quotient of spectral radius, (signless) Laplacian spectral radius and clique number of graphs [PDF]

open access: yes, 2016
summary:In this paper, the upper and lower bounds for the quotient of spectral radius (Laplacian spectral radius, signless Laplacian spectral radius) and the clique number together with the corresponding extremal graphs in the class of connected graphs ...
Das, Kinkar Ch., Liu, Muhuo
core   +1 more source

Influence of ice crystal shape on retrieval of cirrus optical thickness and effective radius: A case study [PDF]

open access: yes, 2009
Airborne measurements of spectral upwelling radiances (350â  2200 nm) reflected by cirrus using the Spectral Modular Airborne Radiation measurement sysTem (SMART)-Albedometer were made over land and water surfaces.
Minikin, Andreas   +7 more
core   +1 more source

The Spectral Radius of Graphs on Surfaces

open access: yesJournal of Combinatorial Theory, Series B, 2000
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Mark N. Ellingham, Xiaoya Zha
openaire   +1 more source

Reverse Inequalities for the Numerical Radius of Linear Operators in Hilbert Spaces [PDF]

open access: yes, 2005
Some elementary inequalities providing upper bounds for the difference of the norm and the numerical radius of a bounded linear operator on Hilbert spaces under appropriate conditions are ...
Sever S. Dragomir, Dragomir, Sever S
core   +1 more source

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