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 2020-10-01 to 2024-10-01.)

Article	Citations
Notes on the linear equation with Stieltjes derivatives	11
Multiplicity of positive solutions for a class of nonlocal problem involving critical exponent	7
Explicit solution and dynamical properties of atmospheric Ekman flows with boundary conditions	7
Sharp results for oscillation of second-order neutral delay differential equations	7
Existence of positive bound state solution for the nonlinear Schrödinger–Bopp–Podolsky system	7
A time-nonlocal inverse problem for a hyperbolic equation with an integral overdetermination condition	7
On the stochastic Allen–Cahn equation on networks with multiplicative noise	6
Pullback attractor for a nonlocal discrete nonlinear Schrödinger equation with delays	6
Necessary and sufficient conditions for the existence of invariant algebraic curves	6
Limit cycles in mass-conserving deficiency-one mass-action systems	5
Higher order stroboscopic averaged functions: a general relationship with Melnikov functions	5
Permanence and exponential stability for generalised nonautonomous Nicholson systems	5
Well-posedness for a fourth-order equation of Moore–Gibson–Thompson type	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
Null controllability for a singular heat equation with a memory term	4
Multiple positive solutions for a logarithmic Schrödinger–Poisson system with singular nonelinearity	4
New oscillation criteria for third-order differential equations with bounded and unbounded neutral coefficients	4
On a solvable class of nonlinear difference equations of fourth order	4
Limit cycles of planar piecewise linear Hamiltonian differential systems with two or three zones	3
Ulam–Hyers stability and exponentially dichotomic equations in Banach spaces	3
Long time behavior of the solution to a chemotaxis system with nonlinear indirect signal production and logistic source	3
Bistable equation with discontinuous density dependent diffusion with degenerations and singularities	3
Existence, uniqueness and qualitative properties of heteroclinic solutions to nonlinear second-order ordinary differential equations	3
A double phase equation with convection	3

Differentiability of solutions with respect to parameters in a class of neutral differential equations with state-dependent delays	3
Uniqueness and monotonicity of solutions for fractional equations with a gradient term	3
Ground state sign-changing solutions and infinitely many solutions for fractional logarithmic Schrödinger equations in bounded domains	2
On oscillation of solutions of scalar delay differential equation in critical case	2
On nonlocal problems for semilinear second order differential inclusions without compactness	2
The existence of solutions for the modified ( p	2
Bifurcation curves of positive solutions for the Minkowski-curvature problem with cubic nonlinearity	2
Special cases of critical linear difference equations	2
Limit cycles of planar discontinuous piecewise linear Hamiltonian systems without equilibria separated by reducible cubics	2
Stability results for the functional differential equations associated to water hammer in hydraulics	2
New results on the existence of ground state solutions for generalized quasilinear Schrödinger equations coupled with the Chern–Simons gauge theory	2
Oscillation of half-linear differential equations with mixed type of argument	2
Existence and multiplicity of positive solutions for singular $\phi$-Laplacian superlinear problems with nonlinear boundary conditions	2
Periodic perturbations of reducible scalar second order functional differential equations	2
Stability index of linear random dynamical systems	2
New monotonicity properties and oscillation of $n$-order functional differential equations with deviating argument	2
Attractivity of solutions of Riemann–Liouville fractional differential equations	2
Asymptotic behavior of solutions to the multidimensional semidiscrete diffusion equation	2
Expansion of positivity to a class of doubly nonlinear parabolic equations	2
Cauchy problem for nonlocal diffusion equations modelling Lévy flights	2
Global smooth linearization of nonautonomous contractions on Banach spaces	2
A class of fourth-order elliptic equations with concave and convex nonlinearities in $\mathbb{R}^N$	2
Geometry and integrability of quadratic systems with invariant hyperbolas	2
Exact solution of the Susceptible–Infectious–Recovered–Deceased (SIRD) epidemic model	2
Optimal harvesting for a stochastic competition system with stage structure and distributed delay	2
Periodic stationary solutions of the Nagumo lattice differential equation: existence regions and their number	2
Geometry, integrability and bifurcation diagrams of a family of quadratic differential systems as application of the Darboux theory of integrability	2
Existence and multiplicity of nontrivial solutions to the modified Kirchhoff equation without the growth and Ambrosetti–Rabinowitz conditions	2
Structurally unstable quadratic vector fields of codimension two: families possessing a finite saddle-node and an infinite saddle-node	2
Weak center for a class of Λ –	2
Strong maximum principle for a sublinear elliptic problem at resonance	1
Minimizing of the quadratic functional on Hopfield networks	1
Half-linear differential equations: Regular variation, principal solutions, and asymptotic classes	1
Homoclinic solutions for a class of asymptotically autonomous Hamiltonian systems with indefinite sign nonlinearities	1
Positive solutions for a class of generalized quasilinear Schrödinger equation involving concave and convex nonlinearities in Orilicz space	1
Properties of Poincaré half-maps for planar linear systems and some direct applications to periodic orbits of piecewise systems	1
Existence and multiplicity of positive solutions for a singular system via sub-supersolution method and Mountain Pass Theorem	1
Ground state solution of semilinear Schrödinger system with local super-quadratic conditions	1
Caffarelli–Kohn–Nirenberg inequality for biharmonic equations with inhomogeneous term and Rellich potential	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
On the cyclicity of Kolmogorov polycycles	1
Periodic and bounded solutions of functional differential equations with small delays	1
General solution to subclasses of a two-dimensional class of systems of difference equations	1
Sign-changing solutions for a Schrödinger–Kirchhoff–Poisson system with 4-sublinear growth nonlinearity	1
Hopf bifurcation in a reaction-diffusive-advection two-species competition model with one delay	1
Existence and exponential stability of periodic solutions of Nicholson-type systems with nonlinear density-dependent mortality and linear harvesting	1
Solitary waves for a fractional Klein–Gordon–Maxwell equations	1
Hyers–Ulam stability for a partial difference equation	1
Global asymptotic stability of a scalar delay Nicholson's blowflies equation in periodic environment	1
On some differential equations involving a new kind of variable exponents	1

On global attractivity of a higher order difference equation and its applications	1
Slow divergence integral in regularized piecewise smooth systems	1
Rectifiability of orbits for two-dimensional nonautonomous differential systems	1
The asymptotic behavior of solutions to a class of inhomogeneous problems: an Orlicz–Sobolev space approach	1
Volterra–Stieltjes integral equations and impulsive Volterra–Stieltjes integral equations	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
The logistic equation in the context of Stieltjes differential and integral equations	1
Solutions for a quasilinear elliptic problem with indefinite nonlinearity with critical growth	1
On the solution manifold of a differential equation with a delay which has a zero	1
Analysis of an age-structured dengue model with multiple strains and cross immunity	1
Existence and multiplicity of eigenvalues for some double-phase problems involving an indefinite sign reaction term	1
Positive solutions to three classes of non-local fourth-order problems with derivative-dependent nonlinearities	1
Optimal version of the Picard–Lindelöf theorem	1
Periodic solutions of second order Hamiltonian systems with nonlinearity of general linear growth	1
Subharmonic bouncing solutions of generalized Lazer–Solimini equation	1
Sobolev inequality with non-uniformly degenerating gradient	1
Existence and uniqueness for a semilinear sixth-order ODE	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
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
Linearized instability for differential equations with dependence on the past derivative	1
The algebraic curves of planar polynomial differential systems with homogeneous nonlinearities	1
Ground states solutions for some non-autonomous Schrödinger-Bopp-Podolsky system	1
Global bifurcation curves of nonlocal elliptic equations with oscillatory nonlinear term	1
Period function of planar turning points	1