Results 11 to 20 of about 494,012 (266)
Feedback Integrators for Mechanical Systems with Holonomic Constraints
Sensors, 2022 The feedback integrators method is improved, via the celebrated Dirac formula, to integrate the equations of motion for mechanical systems with holonomic constraints so as to produce numerical trajectories that remain in the constraint set and preserve ...
Dong Eui Chang +2 more
doaj +1 more source
Organizational Dynamics, 2013 Senior-level executives identify integrity as the most important characteristic for effective leaders and followers. We agree that integrity is vital, but not the only important ethical issue in leadership. We set forth an ethical framework as the basis for examining ethical leadership and followership in organizations.
James Campbell Quick, John L. Goolsby
openaire +3 more sources
Fractal and Fractional, 2022 The propagation of optical soliton profiles in plasma physics and atomic structures is represented by the (1+1)− dimensional Schrödinger dynamical equation, which is the subject of this study.
Muhammad Abu Bakar +4 more
doaj +1 more source
A Review of Matrix SIR Arino Epidemic Models
Mathematics, 2021 Many of the models used nowadays in mathematical epidemiology, in particular in COVID-19 research, belong to a certain subclass of compartmental models whose classes may be divided into three “(x,y,z)” groups, which we will call respectively “susceptible/
Florin Avram +2 more
doaj +1 more source
First Integrals of Differential Operators from SL(2,ℝ) Symmetries
Mathematics, 2020 The construction of first integrals for SL(2,R)-invariant nth-order ordinary differential equations is a non-trivial problem due to the nonsolvability of the underlying symmetry algebra sl(2,R).
Paola Morando +2 more
doaj +1 more source
On a Class of Integrable Systems with a Cubic First Integral [PDF]
Communications in Mathematical Physics, 2010 A few years ago Selivanova gave an existence proof for some integrable models, in fact geodesic flows on two dimensional manifolds, with a cubic first integral. However the explicit form of these models hinged on the solution of a nonlinear third order ordinary differential equation which could not be obtained.
openaire +3 more sources
First Integrals and Symmetries of Nonholonomic Systems
Archive for Rational Mechanics and Analysis, 2022 AbstractIn nonholonomic mechanics, the presence of constraints in the velocities breaks the well-understood link between symmetries and first integrals of holonomic systems, expressed by Noether’s Theorem. However, there is a known special class of first integrals of nonholonomic systems generated by vector fields tangential to the group orbits, called
Balseiro, Paula, Sansonetto, Nicola
openaire +2 more sources
Noetherian first integrals [PDF]
Journal of Nonlinear Mathematical Physics, 2008 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Leach, P. G. L., Flessas, G. P.
openaire +2 more sources
The solution of some persistent $p : -q$ resonant center problems
Electronic Journal of Qualitative Theory of Differential Equations, 2018 The notion of $p:-q$ resonant center was introduced recently and studied by several authors. In this paper we generalize the notion of a persistent center to a persistent $p:-q $ resonant center and find conditions for existence of a persistent $p:-q ...
Maja Zulj +2 more
doaj +1 more source
Darboux and rational first integrals for a family of cubic three dimensional systems
Zanco Journal of Pure and Applied Sciences, 2021 In this paper, we investigate the first integrals of the following system exam.PNG exam1.PNG This kind of system is a particular case of the jerk cubic three dimensional polynomial differential systems.
Sarbast Hussein Mikaeel, Azad I. Amen
doaj +1 more source