Results 41 to 50 of about 5,935,258 (364)

A Fixed Point Approach to the Stability of a Mean Value Type Functional Equation

Mathematics, 2017
We prove the generalized Hyers–Ulam stability of a mean value type functional equation f ( x ) − g ( y ) = ( x − y ) h ( x + y ) by applying a method originated from fixed point theory.
Soon-Mo Jung, Yang-Hi Lee
doaj   +1 more source

The convergence of the Euler's method

Journal of Numerical Analysis and Approximation Theory, 2010
In this article we study the Euler's iterative method. For this method we give a global theorem of convergence. In the last section of the paper we give a numerical example which illustrates the result exposed in this work.
Raluca Anamaria Sălăjan (Pomian)
doaj   +2 more sources

Three Dimensional Nonlinear Sigma Models in the Wilsonian Renormalization Method

, 2003
The three dimensional nonlinear sigma model is unrenormalizable in perturbative method. By using the $\beta$ function in the nonperturbative Wilsonian renormalization group method, we argue that ${\cal N}=2$ supersymmetric nonlinear $\sigma$ models are ...
Higashijima, K., Itou, E.
core   +3 more sources

Two-Loop Renormalization Group Analysis of the Burgers-Kardar-Parisi-Zhang Equation [PDF]

, 1994
A systematic analysis of the Burgers--Kardar--Parisi--Zhang equation in $d+1$ dimensions by dynamic renormalization group theory is described. The fixed points and exponents are calculated to two--loop order. We use the dimensional regularization scheme,
A. M. Polyakov, B. Derrida, B. M. Forrest, C. A. Doty, C. de Dominicis, C. Itzykson, D. A. Huse, D. E. Wolf, D. Forster, D. J. Amit, D. R. Nelson, D. S. Fisher, E. Brézin, E. Medina, Erwin Frey, G. 't Hooft, G. Parisi, H. K. Janssen, H. K. Janssen, H. van Beijeren, H. van Beijeren, I. Proccacia, J. Cook, J. Krug, J. Krug, J. Krug, J. M. Kim, J. P. Bouchaud, J. P. Bouchaud, J. P. Doherty, J. Z. Imbrie, J. Zinn Justin, K. G. Wilson, K. Kawasaki, L. H. Tang, M. Kardar, M. Kardar, M. Kardar, M. Mezard, P. C. Martin, R. Baussch, R. Graham, S. F. Edwards, S. K. Ma, S. Zalesky, T. Ala Nissila, T. Ala Nissila, T. Hwa, T. Hwa, T. Hwa, T. Nattermann, T. Sun, U. Deker, Uwe Claus Täuber, V. S. L'vov   +54 more
core   +2 more sources

Fixed Point Method to Analyze Differences between Hipparcos and ICRF2

Abstract and Applied Analysis, 2014
From 1998, the International Astronomical Union (IAU) adopted a new Celestial Reference System: the International Celestial Reference System (ICRS). The first optical materialization was the Hipparcos catalogue, defining the Hipparcos Celestial Reference
María José Martínez Usó, Francisco J. Marco Castillo, José Antonio López Ortí   +2 more
doaj   +1 more source

Sigma-terms and axial charges for hyperons and charmed baryons

, 2014
We present results for the $\sigma$-terms and axial charges for various hyperons and charmed baryons using $N_f=2+1+1$ twisted mass fermions. For the computation of the three-point function we use the fixed current method.
Alexandrou, C., Hadjiyiannakou, K., Jansen, K., Kallidonis, Ch.   +3 more
core   +1 more source

Moving in the Dark: Enlightening the Spatial Population Ecology of European Cave Salamanders

Population Ecology, EarlyView.
We assessed individual interactions, movement ecology and activity patterns of a subterranean population of Speleomantes strinatii, applying spatial capture–recapture modeling to a photographic dataset of 104 individuals. ABSTRACT Space use and movement are fundamental aspects of organisms' ecology, mirroring individual fitness, behavior, and life ...
Giacomo Rosa, Andrea Costa, Sebastiano Salvidio   +2 more
wiley   +1 more source

Relative periodic orbits in point vortex systems

, 2004
We give a method to determine relative periodic orbits in point vortex systems: it consists mainly into perform a symplectic reduction on a fixed point submanifold in order to obtain a two-dimensional reduced phase space.
Aref H, Aref H, Aref H, F Laurent-Polz, Helmholz H, Laurent-Polz F, Laurent-Polz F, Laurent-Polz F, Laurent-Polz F, Marsden J, Ortega J-P, Ortega J-P, Palais R, Pekarsky S   +13 more
core   +2 more sources

Infection Models for Pine Wilt Disease on the Basis of Vector Behaviors

Population Ecology, EarlyView.
Infection models for pine wilt disease without vector density were built to estimate the transmission coefficient of the pathogenic nematode. The models successfully simulated the annual change in the density of infected trees for four pine stands. ABSTRACT Pine wilt disease is caused by the pinewood nematode (Bursaphelenchus xylophilus Steiner et ...
Katsumi Togashi
wiley   +1 more source

On Iterative Algorithms for Quantitative Photoacoustic Tomography in the Radiative Transport Regime

, 2017
In this paper, we describe the numerical reconstruction method for quantitative photoacoustic tomography (QPAT) based on the radiative transfer equation (RTE), which models light propagation more accurately than diffusion approximation (DA).
Wang, Chao, Zhou, Tie
core   +2 more sources