Results 11 to 20 of about 246 (214)

Perimeter preserver of matrices over semifields [PDF]

, 1984
summary:For a rank-$1$ matrix $A= {\bold a \bold b}^t$, we define the perimeter of $A$ as the number of nonzero entries in both $\bold a$ and $\bold b$. We characterize the linear operators which preserve the rank and perimeter of rank-$1$ matrices over ...
Norman J. Pullman, Jun, Young Bae, Pullman, Norman J., Kyung-Tae Kang, Song, Seok-Zun, Kang, Kyung-Tae, Jun, Young-Bae, Beasley, LeRoy B., Seok-Zun Song, Zhao, Xianzhong, Chen, Yizhi, LeRoy B. Beasley   +11 more
core   +2 more sources

Cone type majorization and its strong linear preservers

The Electronic Journal of Linear Algebra, 2020
This study introduces a novel notion, cone type majorization and characterizes the same. Further, the structure of linear preservers and strong linear preservers of this cone type majorization have been studied.
Kosuru, G. Sankara Raju, Saha, Subhajit
openaire   +3 more sources

Strong Stability Preserving Explicit Linear Multistep Methods with Variable Step Size [PDF]

SIAM Journal on Numerical Analysis, 2016
Strong stability preserving (SSP) methods are designed primarily for time integration of nonlinear hyperbolic PDEs, for which the permissible SSP step size varies from one step to the next. We develop the first SSP linear multistep methods (of order two and three) with variable step size, and prove their optimality, stability, and convergence.
Yiannis Hadjimichael, David I. Ketcheson, Lajos Lóczi, Adrián Németh   +3 more
openaire   +4 more sources

The Mazur-Ulam property for a Banach space which satisfies a separation condition (Research on preserver problems on Banach algebras and related topics) [PDF]

, 2023
After some preparations in section 1, we recall the three well known concepts: the Choquet boundary, the Šilov boundary, and the strong boundary points in section 2. We need to define them by avoiding the confusion which appears because of the variety of
HATORI, Osamu
core  

Implicit and Implicit–Explicit Strong Stability Preserving Runge–Kutta Methods with High Linear Order [PDF]

Journal of Scientific Computing, 2017
When evolving in time the solution of a hyperbolic partial differential equation, it is often desirable to use high order strong stability preserving (SSP) time discretizations. These time discretizations preserve the monotonicity properties satisfied by the spatial discretization when coupled with the first order forward Euler, under a certain time ...
Sidafa Conde, Sigal Gottlieb, Zachary J. Grant, John N. Shadid   +3 more
openaire   +3 more sources

Computation of Optimal Linear Strong Stability Preserving Methods Via Adaptive Spectral Transformations of Poisson–Charlier Measures [PDF]

Journal of Scientific Computing, 2021
50 pages, 5 ...
openaire   +3 more sources

Optimal explicit strong stability preserving Runge–Kutta methods with high linear order and optimal nonlinear order [PDF]

Mathematics of Computation, 2015
High order spatial discretizations with monotonicity properties are often desirable for the solution of hyperbolic PDEs. These methods can advantageously be coupled with high order strong stability preserving time discretizations. The search for high order strong stability time-stepping methods with large allowable strong stability
Sigal Gottlieb, Zachary Grant, Daniel Higgs   +2 more
openaire   +4 more sources

Strong linear preservers of symmetric doubly stochastic or doubly substochastic matrices

Linear Algebra and its Applications, 2004
The authors present some results about LOCC graphs, i.e. graphs with particular connected components, and by means of them improve some results due to \textit{C. K. Li, B. S. Tam}, and \textit{N. K. Tsing} [Linear Algebra Appl. 341, 5--22 (2002; Zbl 0998.15004)].
Lin, Shwu-Huey, Tam, Bit-Shun
openaire   +2 more sources

Guidelines for Pediatric Radiotherapy Simulation: A Report From the Children's Oncology Group Radiation Oncology Discipline

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric radiation therapy presents unique challenges compared to adult treatments, including those of immobilization, potential need for sedation, and the critical importance of accurate, reproducible positioning. Additionally, heightened attention to imaging doses is necessary to minimize long‐term toxicity in survivors.
Parham Alaei, Stephen Mihalcik, Sujith Baliga, Young Kwok, Dana Casey, Eric Ehler, Christiane Burton, John C. Breneman, Daphne A. Haas‐Kogan, Suzanne L. Wolden, Arnold C. Paulino, Nadia N. Laack, Natia Esiashvili, Sarah Milgrom, Christine Hill‐Kayser, Thomas J. Fitzgerald, John A. Kalapurakal, Chia‐Ho Hua   +17 more
wiley   +1 more source

Psychosocial Functioning After Pediatric Bone Sarcoma: Generic and Survivor‐Specific Outcomes in Adolescent and Young Adult Patients

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Pediatric bone sarcoma patients and survivors may experience psychosocial challenges related to childhood cancer after their intensive, body‐altering treatment. This cross‐sectional study aimed to evaluate generic and survivor‐specific psychosocial outcomes in a national cohort of pediatric bone sarcoma patients and survivors, and ...
Hinke van der Hoek, Heleen Maurice‐Stam, Laura R. Beek, Jennifer van Dijk, Marjolein E. M. Langemeijer, Relinde W. Slooff‐Lentink, Alied M. van der Aa‐van Delden, Anne Westerweel, Marloes van Gorp, Hendrik W. B. Schreuder, Lianne M. Haveman, W. Peter Bekkering, Leonie G. Tigelaar, Johannes H. M. Merks, Martha A. Grootenhuis   +14 more
wiley   +1 more source