Results 51 to 60 of about 768,175 (328)

New Bounds for the Davis–Wielandt Radius via the Moore–Penrose Inverse of Bounded Linear Operators

Axioms
In this paper, we obtain some new upper bounds involving powers of the Davis–Wielandt radius of bounded linear operators with closed ranges by using the Moore–Penrose inverse.
Xiaomei Dong, Yuzhen Guo, Deyu Wu
doaj   +1 more source

Further Inequalities for Sequences and Power Series of Operators in Hilbert Spaces Via Hermitian Forms

Moroccan Journal of Pure and Applied Analysis, 2016
By the use of some inequalities for nonnegative Hermitian forms some new inequalities for sequences and power series of bounded linear operators in complex Hilbert spaces are established.
Dragomir S. S.
doaj   +1 more source

Numerical radius inequalities and its applications in estimation of zeros of polynomials

, 2019
We present some upper and lower bounds for the numerical radius of a bounded linear operator defined on complex Hilbert space, which improves on the existing upper and lower bounds. We also present an upper bound for the spectral radius of sum of product
Abu-Omar, Abu-Omar, Abu-Omar, Al-Dolat, Alpin, Bani-Domi, Dragomir, Fong, Fujii, Horn, Kallol Paul, Kittaneh, Kittaneh, Kittaneh, Paul, Paul, Pintu Bhunia, Santanu Bag, Sattari, Yamazaki   +19 more
core   +1 more source

Reduced vascular leakage correlates with breast carcinoma T regulatory cell infiltration but not with metastatic propensity

Molecular Oncology, EarlyView.
A mouse model for vascular normalization and a human breast cancer cohort were studied to understand the relationship between vascular leakage and tumor immune suppression. For this, endothelial and immune cell RNAseq, staining for vascular function, and immune cell profiling were employed.
Liqun He, Chiara Testini, Neda Hekmati, Altea Bonello, Aglaia Schiza, Emmanuel Nwadozi, Mia Phillipson, Carina Strell, Michael Welsh   +8 more
wiley   +1 more source

Further norm and numerical radii inequalities for operators involving a positive operator

AIMS Mathematics
The article examines inequalities for norms and numerical radii of bounded linear operators on complex Hilbert spaces. It focuses on scenarios where three operators are involved, with one being positive, and investigates their sums or products.
Najla Altwaijry, Cristian Conde, Silvestru Sever Dragomir, Kais Feki   +3 more
doaj   +1 more source

Hyperbolic geometry on noncommutative balls [PDF]

, 2009
In this paper, we study the hyperbolic geometry of noncommutative balls generated by the joint operator radius $\omega_\rho$, $\rho\in (0,\infty]$, for $n$-tuples of bounded linear operators on a Hilbert space.
Popescu, Gelu
core   +1 more source

Free expansion of attractive and repulsive Bose-Einstein condensed vortex states

, 2001
Free expansion of attractive and repulsive Bose-Einstein condensed vortex states formed in an axially symmetric trap is investigated using the numerical solution of the time-dependent Gross-Pitaevskii equation.
Adhikari, Sadhan K.
core   +2 more sources

Strength through diversity: how cancers thrive when clones cooperate

Molecular Oncology, EarlyView.
Intratumor heterogeneity can offer direct benefits to the tumor through cooperation between different clones. In this review, Kuiken et al. discuss existing evidence for clonal cooperativity to identify overarching principles, and highlight how novel technological developments could address remaining open questions.
Marije C. Kuiken, Maartje Witsen, Emile E. Voest, Krijn K. Dijkstra   +3 more
wiley   +1 more source

Influence and Optimization of Geometric Parameters for Small-Radius Curved Tunnel Based on Response Surface Method

Applied Sciences, 2023
Compared with straight tunnels, small-radius curved tunnels are more common and have more complex influencing factors in urban underground traffic. Therefore, the seismic evaluation of small-radius curved tunnels is of great significance for the safe ...
Xiaojiu Feng, Yongtian Xie, Shaofeng Liu, Fujian Yang   +3 more
doaj   +1 more source

Effective Inner Radius of Tilted Black Hole Accretion Disks

, 2009
One of the primary means of determining the spin of an astrophysical black hole is by actually measuring the inner radius of a surrounding accretion disk and using that to infer the spin.
Agol, Anninos, Davis, De Villiers, Dexter, Fragile, Fragile, Fragile, Ingram, Krolik, Miller, Novikov, P. Chris Fragile, Reynolds, Shafee   +14 more
core   +1 more source