OOIR: Observatory of International Research

Papers

(The TQCC of Electronic Journal of Qualitative Theory of Differential Equations is 1. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2020-03-01 to 2024-03-01.)

Article	Citations
Notes on the linear equation with Stieltjes derivatives	10
Necessary and sufficient conditions for the existence of invariant algebraic curves	6
Explicit solution and dynamical properties of atmospheric Ekman flows with boundary conditions	6
Existence of positive bound state solution for the nonlinear Schrödinger–Bopp–Podolsky system	6
A time-nonlocal inverse problem for a hyperbolic equation with an integral overdetermination condition	6
Permanence and exponential stability for generalised nonautonomous Nicholson systems	5
Null controllability for a singular heat equation with a memory term	5
Limit cycles in mass-conserving deficiency-one mass-action systems	5
Sharp results for oscillation of second-order neutral delay differential equations	4
Multiplicity of positive solutions for a class of nonlocal problem involving critical exponent	4
Oscillation and spectral properties of some classes of higher order differential operators and weighted $n$th order differential inequalities	4
A sequence of positive solutions for sixth-order ordinary nonlinear differential problems	4
Well-posedness for a fourth-order equation of Moore–Gibson–Thompson type	4
Higher order stroboscopic averaged functions: a general relationship with Melnikov functions	4
On the stochastic Allen–Cahn equation on networks with multiplicative noise	4
Long time behavior of the solution to a chemotaxis system with nonlinear indirect signal production and logistic source	3
Pullback attractor for a nonlocal discrete nonlinear Schrödinger equation with delays	3
Multiple positive solutions for a logarithmic Schrödinger–Poisson system with singular nonelinearity	3
Bistable equation with discontinuous density dependent diffusion with degenerations and singularities	3
Differentiability of solutions with respect to parameters in a class of neutral differential equations with state-dependent delays	3
New oscillation criteria for third-order differential equations with bounded and unbounded neutral coefficients	3
Geometry, integrability and bifurcation diagrams of a family of quadratic differential systems as application of the Darboux theory of integrability	3
Ulam–Hyers stability and exponentially dichotomic equations in Banach spaces	3
Positive solutions to three classes of non-local fourth-order problems with derivative-dependent nonlinearities	2
Existence, uniqueness and qualitative properties of heteroclinic solutions to nonlinear second-order ordinary differential equations	2

On nonlocal problems for semilinear second order differential inclusions without compactness	2
Periodic stationary solutions of the Nagumo lattice differential equation: existence regions and their number	2
Bifurcation curves of positive solutions for the Minkowski-curvature problem with cubic nonlinearity	2
Existence and multiplicity of nontrivial solutions to the modified Kirchhoff equation without the growth and Ambrosetti–Rabinowitz conditions	2
Weak center for a class of Λ –	2
Existence and multiplicity of positive solutions for singular $\phi$-Laplacian superlinear problems with nonlinear boundary conditions	2
Geometry and integrability of quadratic systems with invariant hyperbolas	2
Stability index of linear random dynamical systems	2
The existence of solutions for the modified ( p	2
On a solvable class of nonlinear difference equations of fourth order	2
Stability results for the functional differential equations associated to water hammer in hydraulics	2
Oscillation of half-linear differential equations with mixed type of argument	2
New results on the existence of ground state solutions for generalized quasilinear Schrödinger equations coupled with the Chern–Simons gauge theory	2
Periodic perturbations of reducible scalar second order functional differential equations	2
Uniqueness and monotonicity of solutions for fractional equations with a gradient term	2
Exact solution of the Susceptible–Infectious–Recovered–Deceased (SIRD) epidemic model	2
A double phase equation with convection	2
Optimal harvesting for a stochastic competition system with stage structure and distributed delay	2
Expansion of positivity to a class of doubly nonlinear parabolic equations	2
Global smooth linearization of nonautonomous contractions on Banach spaces	2
Existence and exponential stability of periodic solutions of Nicholson-type systems with nonlinear density-dependent mortality and linear harvesting	1
On some differential equations involving a new kind of variable exponents	1
Existence of positive solutions for a class of p-Laplacian type generalized quasilinear Schrödinger equations with critical growth and potential vanishing at infinity	1
Attractivity of solutions of Riemann–Liouville fractional differential equations	1
Volterra–Stieltjes integral equations and impulsive Volterra–Stieltjes integral equations	1
Special cases of critical linear difference equations	1
Limit cycles of planar discontinuous piecewise linear Hamiltonian systems without equilibria separated by reducible cubics	1
The algebraic curves of planar polynomial differential systems with homogeneous nonlinearities	1
Ground state sign-changing solutions and infinitely many solutions for fractional logarithmic Schrödinger equations in bounded domains	1
Existence and multiplicity of eigenvalues for some double-phase problems involving an indefinite sign reaction term	1
Homoclinic solutions for a class of asymptotically autonomous Hamiltonian systems with indefinite sign nonlinearities	1
Cauchy problem for nonlocal diffusion equations modelling Lévy flights	1
On oscillation of solutions of scalar delay differential equation in critical case	1
Existence and uniqueness for a semilinear sixth-order ODE	1
Hyers–Ulam stability for a partial difference equation	1
Positive solutions for a class of generalized quasilinear Schrödinger equation involving concave and convex nonlinearities in Orilicz space	1
The asymptotic behavior of solutions to a class of inhomogeneous problems: an Orlicz–Sobolev space approach	1
New monotonicity properties and oscillation of $n$-order functional differential equations with deviating argument	1
Corrigendum to "On the stochastic Allen–Cahn equation on networks with multiplicative noise" [Electron. J. Qual. Theory Differ. Equ. 2021, No. 7, 1–24]	1
Bifurcation for a class of piecewise cubic systems with two centers	1
Existence and exact multiplicity of positive periodic solutions to forced non-autonomous Duffing type differential equations	1
Asymptotic behavior of solutions to the multidimensional semidiscrete diffusion equation	1
Optimal version of the Picard–Lindelöf theorem	1
Period function of planar turning points	1
Global asymptotic stability of a scalar delay Nicholson's blowflies equation in periodic environment	1
Global phase portraits of a predator–prey system	1
Properties of Poincaré half-maps for planar linear systems and some direct applications to periodic orbits of piecewise systems	1
On the solution manifold of a differential equation with a delay which has a zero	1
Existence and multiplicity of positive solutions for a singular system via sub-supersolution method and Mountain Pass Theorem	1
Sobolev inequality with non-uniformly degenerating gradient	1

Rectifiability of orbits for two-dimensional nonautonomous differential systems	1
Existence of global solutions to chemotaxis fluid system with logistic source	1
Sign-changing solutions for fourth-order elliptic equations of Kirchhoff type with critical exponent	1
Ground states solutions for some non-autonomous Schrödinger-Bopp-Podolsky system	1
Periodic and bounded solutions of functional differential equations with small delays	1
Solitary waves for a fractional Klein–Gordon–Maxwell equations	1
Solutions for a quasilinear elliptic problem with indefinite nonlinearity with critical growth	1
Minimizing of the quadratic functional on Hopfield networks	1
Structurally unstable quadratic vector fields of codimension two: families possessing a finite saddle-node and an infinite saddle-node	1
The logistic equation in the context of Stieltjes differential and integral equations	1
Strong maximum principle for a sublinear elliptic problem at resonance	1
Hopf bifurcation in a reaction-diffusive-advection two-species competition model with one delay	1