It is shown that, for any time-invariant exponentially stable linear system with additive
disturbances, time-varying exponentially stable interval observers can be constructed. The …

A diffusive predator–prey system with Holling type-II predator functional response subject to
Neumann boundary conditions is considered. Hopf and steady state bifurcation analysis are …

In this paper, Ulam stability and data dependence for fractional differential equations with
Caputo fractional derivative of order α are studied. We present four types of Ulam stability …

Global bifurcation analysis of a class of general predator–prey models with a strong Allee
effect in prey population is given in details. We show the existence of a point-to-point …

ULAM STABILITY OF ORDINARY DIFFERENTIAL EQUATIONS 1. Introduction The basic
statements of data dependence in the theory of ordin Page 1 STUDIA UNIV. “BABES–BOLYAI” …

Investor sophistication has lagged behind the growing complexity of retail financial markets.
To explore this, we develop a dynamic model to study the interaction between obfuscation …

In biochemical networks, complex dynamical features such as superlinear growth and
oscillations are classically considered a consequence of autocatalysis. For the large class of …

In this paper, using the Riemann‐Liouville fractional integral with respect to another function
and the ψ− Hilfer fractional derivative, we propose a fractional Volterra integral equation and …

In this paper, we study nonlinear fractional differential equations with Hadamard derivative
and Ulam stability in the weighted space of continuous functions. Firstly, some new …

In this work, an intelligent computing algorithm is developed for finding the approximate
solution of heart model based on nonlinear Van der Pol (VdP)-type second-order ordinary …