Results 41 to 50 of about 1,235,690 (292)
Reverse Inequalities for the Numerical Radius of Linear Operators in Hilbert Spaces [PDF]
, 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
Bounds for the spectral radius of positive operators
Electronic Journal of Differential Equations, 2022 We use partially ordered spaces to obtain bounds for the spectral radius of positive linear operators, and to improve the corresponding fixed point theorems.
Mohammed Said El Khannoussi +1 more
doaj +3 more sources
Emerging experimental and computational methods for studying redox‐regulated structural transitions
FEBS Letters, EarlyView.Redox reactions can reshape proteins and alter how they behave in cells, with important consequences for health and disease. This review explores emerging experimental and computational approaches for discovering these redox‐sensitive protein switches, revealing their structural effects, and predicting their behavior, opening new opportunities to ...
Tasneem Rass +2 more
wiley +1 more source
Optimal network modification for spectral radius dependent phase transitions
New Journal of Physics, 2016 The dynamics of contact processes on networks is often determined by the spectral radius of the networks adjacency matrices. A decrease of the spectral radius can prevent the outbreak of an epidemic, or impact the synchronization among systems of coupled
Yonatan Rosen +2 more
doaj +1 more source
New Condition of Automatic Continuity of Dense Range Homomorphisms on Jordan – Banach Algebras [PDF]
مجلة التربية والعلم, 2018 The following open problem stated that, if T: A⟶B is a dense range homomorphism between Banach algebras A and B such that B is semi-simple. Is T automatically continuous? (see [1]).
RUQAYAH N. BALO +2 more
doaj +1 more source
The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation
FEBS Letters, EarlyView.Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge +6 more
wiley +1 more source
FEBS Letters, EarlyView.Vacuolar H+‐ATPase (V‐ATPase) is a multisubunit rotary proton pump that acidifies intracellular compartments. Using elastic network models, we identified conserved hinge residues that govern its large‐scale functional motions. We show that intrinsically encoded ‘soft modes’ drive critical functional transitions, including rotary catalysis and ...
Diksha Parwana +3 more
wiley +1 more source
Perron-Frobenius Theorem for Spectral Radius Analysis [PDF]
, 2016 The spectral radius of a matrixAis the maximum norm of alleigenvalues ofA. In previous work we already formalized that for acomplex matrixA, the values inAngrow polynomially innif andonly if the spectral radius is at most one.
José Divasón [0000-0002-5173-128X] +3 more
core
The VHL tumor suppressor at the crossroad of protein folding, aggregation, and cancer
Molecular Oncology, EarlyView.Mutations, environmental stress, and chaperone dysfunction can destabilize pVHL, promoting its conversion from the native folded state into amyloid‐like assemblies. This transition may contribute to protein storage, cell dormancy, survival, and drug resistance.
Lara Abad +2 more
wiley +1 more source
, 2008 We show how one can associate a Hermitian operator P to every operator A , and we prove that the invertibility properties of P imply the non-transitivity and density of the spectral radius algebra associated to A .
Petrovic, Srdjan +3 more
core +1 more source