Periodicity in distribution. I: Discrete systems.
Periodicity in quasipolynomial convolution.
Periodicity of some recurrence sequences modulo .
Permanence and global attractivity of a delayed discrete predator-prey system with general Holling-type functional response and feedback controls.
Permanence and global attractivity of discrete predator-prey system with Hassell-Varley type functional response.
Permanence and global stability of positive periodic solutions of a discrete competitive system.
Permanence and stable periodic solution for a discrete competitive system with multidelays.
Permanence for a discrete model with feedback control and delay.
Permanence for a generalized discrete neural network system.
Permanence of a discrete model of mutualism with infinite deviating arguments.
Permanence of a discrete -species Schoener competition system with time delays and feedback controls.
Permanence of a discrete nonlinear prey-competition system with delays.
Permanence of a discrete periodic Volterra model with mutual interference.
Permanence of a discrete predator-prey system with Beddington-DeAngelis functional response and feedback controls.
Perron-type criterion for linear difference equations with distributed delay.
Perturbation method for linear difference equations with small parameters.
Pexider functional equations -- their fuzzy analogs.
Pexider type operators and their norms in spaces
In this paper, we introduce Pexiderized generalized operators on certain special spaces introduced by Bielecki-Czerwik and investigate their norms.
Pexider's equation and aggregation of allocations.
Phases of linear difference equations and symplectic systems
The second order linear difference equation where and , is considered as a special type of symplectic systems. The concept of the phase for symplectic systems is introduced as the discrete analogy of the Borůvka concept of the phase for second order linear differential equations. Oscillation and nonoscillation of (1) and of symplectic systems are investigated in connection with phases and trigonometric systems. Some applications to summation of number series are given, too.