Results 31 to 40 of about 1,548,203 (287)

Decay estimates for variable coefficient wave equations in exterior domains

, 2008
In this article we consider variable coefficient, time dependent wave equations in exterior domains. We prove localized energy estimates if the domain is star-shaped and global in time Strichartz estimates if the domain is strictly convex.Comment: 15 ...
A. Strauss Walter, Alinhac Serge, Christ Michael, E. Kenig Carlos, F. Smith Hart, F. Smith Hart, F. Smith Hart, F. Smith Hart, F. Smith Hart, F. Smith Hart, Keel Markus, Keel Markus, L. Metcalfe Jason, Metcalfe Jason, Metcalfe Jason, Mockenhaupt Gerd, S. Morawetz Cathleen, S. Strichartz Robert, Tataru Daniel, Tataru Daniel, Tataru Daniel   +20 more
core   +2 more sources

Faber Polynomial Coefficient Estimates for Bi-Univalent Functions Defined by Using Differential Subordination and a Certain Fractional Derivative Operator

Mathematics, 2020
In this article, we introduce a general family of analytic and bi-univalent functions in the open unit disk, which is defined by applying the principle of differential subordination between analytic functions and the Tremblay fractional derivative ...
Hari M. Srivastava, Ahmad Motamednezhad, Ebrahim Analouei Adegani   +2 more
doaj   +1 more source

Coefficient Bounds for a Family of s-Fold Symmetric Bi-Univalent Functions

Axioms, 2023
We present a new family of s-fold symmetrical bi-univalent functions in the open unit disc in this work. We provide estimates for the first two Taylor–Maclaurin series coefficients for these functions.
Isra Al-shbeil, Nazar Khan, Fairouz Tchier, Qin Xin, Sarfraz Nawaz Malik, Shahid Khan   +5 more
doaj   +1 more source

New insights on the impact of coefficient instability on ratio-correlation population estimates [PDF]

, 2016
In this study we examine the regression-based ratio-correlation method and suggest some new tools for assessing the magnitude and impact of coefficient instability on population estimation errors. We use a robust sample of 904 counties from 11 states and
Swanson, David A, Tayman, Jeff
core   +1 more source

Coefficient Estimates for Certain Classes of Bi-Univalent Functions

International Journal of Mathematics and Mathematical Sciences, 2013
A function analytic in the open unit disk is said to be bi-univalent in if both the function and its inverse map are univalent there. The bi-univalency condition imposed on the functions analytic in makes the behavior of their coefficients ...
Jay M. Jahangiri, Samaneh G. Hamidi
doaj   +1 more source

Coefficient Estimate and Fekete-Szeg\"{o} Problems for Certain New Subclasses of Bi-univalent Functions Defined by Generalized Bivariate Fibonacci Polynomial [PDF]

Sahand Communications in Mathematical Analysis
This article deals with two new subclasses of analytic and bi-univalent functions in the open unit disk, which is defined  by applying subordination principle between analytic functions and the generalized Bivariate Fibonacci polynomials.
Rumeysa Öztürk, İbrahim Aktaş
doaj   +1 more source

Coefficients of a Comprehensive Subclass of Meromorphic Bi-Univalent Functions Associated with the Faber Polynomial Expansion

Axioms, 2021
In this paper, we introduce a new comprehensive subclass ΣB(λ,μ,β) of meromorphic bi-univalent functions in the open unit disk U. We also find the upper bounds for the initial Taylor-Maclaurin coefficients |b0|, |b1| and |b2| for functions in this ...
Hari Mohan Srivastava, Ahmad Motamednezhad, Safa Salehian   +2 more
doaj   +1 more source

Coefficient estimates for exponential series [PDF]

Proceedings of the American Mathematical Society, 1974
Results are obtained which relate the size of the coefficients a n {a_n} of an exponential series f ( x ) = Σ n = 0 ∞ a n
openaire   +1 more source

Imaging of High‐Risk Neuroblastoma: Recommendations From SIOPEN Radiology and Nuclear Medicine Specialty Committees

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Neuroblastoma is the most common extracranial solid tumor in early childhood. Its clinical behavior is highly variable, ranging from spontaneous regression to fatal outcome despite intensive treatment. The International Society of Pediatric Oncology Europe Neuroblastoma Group (SIOPEN) Radiology and Nuclear Medicine Specialty Committees ...
Annemieke Littooij, Catia Olianti, Herve Brisse, Pier Luigi Di Paolo, Maria Garganese, Tejas Kapadia, Jurgen Schaefer, Hugh Wallace, Simon Wan, Bart de Keizer, Irmina Sefic Pasic, Julian Rogasch   +11 more
wiley   +1 more source

Fekete–Szegö Functional Problem for a Special Family of m-Fold Symmetric Bi-Univalent Functions

Mathematics, 2022
In the current work, we introduce a special family of the function family of analytic and m-fold symmetric bi-univalent functions and obtain estimates of the Taylor–Maclaurin coefficients |dm+1| and |d2m+1| for functions in the special family.
Sondekola Rudra Swamy, Basem Aref Frasin, Ibtisam Aldawish   +2 more
doaj   +1 more source