Results 81 to 90 of about 2,196,572 (258)
Non-existence of limit cycles via inverse integrating factors
Electronic Journal of Differential Equations, 2011 It is known that if a planar differential systems has an inverse integrating factor, then all the limit cycles contained in the domain of definition of the inverse integrating factor are contained in the zero set of this function.
Leonardo Laura-Guarachi +2 more
doaj
Asian Journal of Control, EarlyView.Abstract The linear‐quadratic regulator (LQR) problem of optimal control of an uncertain discrete‐time linear system (DTLS) is revisited in this paper from the perspective of Tikhonov regularization. We show that an optimally chosen regularization parameter reduces, compared to the classical LQR, the values of a scalar error function, as well as the ...
Fernando Pazos, Amit Bhaya
wiley +1 more source
Journal of Differential Equations, 2004 The article is devoted to Darbouxian integrable planar systems whose right-hand sides are homogeneous polynomials. A new subclass of such systems having either a focus or a center at the origin is presented. Additionally, the authors consider the existence of algebraic limit cycles of mentioned systems.
Giné, Jaume, Llibre, Jaume
openaire +2 more sources
British Educational Research Journal, EarlyView.Abstract This paper presents an exploratory analysis of contemporary curricular and professional qualification policies in the Scottish education system, focusing on minimum qualification thresholds for mathematics teaching. The study examines how veteran secondary mathematics practitioners perceive the structural and pedagogical implications of using ...
Paul Argyle McDonald
wiley +1 more source
Business Strategy and the Environment, EarlyView.ABSTRACT This study systematizes the literature on eco‐innovation and economic complexity, aiming to understand how the sophistication of productive structures shapes countries' capacity to develop environmentally responsible innovations, and how eco‐innovation may, in turn, influence productive sophistication.
Gregory Matheus Pereira de Moraes +1 more
wiley +1 more source
Business Strategy and the Environment, EarlyView.ABSTRACT This study provides an exploratory, descriptive analysis of how knowledge management (KM) research engages with responsible sustainability from a strategic perspective. Using bibliometric science mapping, we analyse 97 Web of Science publications to identify dominant thematic patterns, relative emphases and conceptual blind spots shaping the ...
Jaime J. González‐Masip
wiley +1 more source
Limit cycles for the Kukles system [PDF]
, 2008 This paper investigates the number and distributions of limit\ud cycles for the Kukles system, which also can be regarded as a\ud class of reduced Kukles system under cubic perturbation.
Zhang, Tonghua +5 more
core +1 more source
Business Strategy and the Environment, EarlyView.ABSTRACT Small and medium‐sized enterprises (SMEs) play a critical role in sustainability transitions, yet the mechanisms through which managers' values shape environmentally sustainable practices (ESP) remain insufficiently understood. Existing research often treats managerial values as independent predictors and pays limited attention to their ...
Marie Romuald Bernard Pouka Pouka +2 more
wiley +1 more source
The string dual to two-dimensional Yang-Mills theory
Journal of High Energy PhysicsWe propose that chiral two-dimensional Yang-Mills theory on a Riemann surface is dual to a deformed stationary subsector of the Gromov-Witten theory of that surface.
Lior Benizri, Jan Troost
doaj +1 more source
Electronic Journal of Qualitative Theory of Differential EquationsConsider the class ${\bf QS}$ of all non-degenerate planar quadratic differential systems and its subclass ${\bf QSP}$ of all its systems possessing an invariant parabola.
Nicolae Vulpe
doaj +1 more source