Add to ORKGBased on the theory of Leray-Schauder degree and Schauder’s fixed point theorem, we find nontrivial nonnegative periodic solutions for an integral equation that models infectious disease with latency periods
AbstractIn this paper, the simultaneous existence of positive, negative and sign-changing periodic s...
In this paper, a discrete-time SIR epidemic model with nonlinear incidence rate, time delays and imp...
A system of integral equations related to an epidemic model is investigated. Namely, we derive suffi...
AbstractPeriodic solutions for a class of delay integral equations modeling epidemics are shown to b...
AbstractThrough the use of the limiting equation, conditions are given under which a scalar nonlinea...
In this paper we study the existence of periodic solutions of a Volterra type integral equation with...
The existence of a continuous periodic solution of the system x(t)=f(t)+t∫−∞q(t,s,x(s))ds, is studie...
Based on the fixed point index theory for a Banach space, nontrivial periodic solutions are found fo...
In this article, we consider a model for the spread of certain infectious disease governed by a del...
We consider the following model that describes the spread of n types of epidemics which are interdep...
AbstractIn this paper, we study the existence of nontrivial nonnegative periodic solutions for the q...
We study the existence of asymptotically periodic solutions of a nonlinear Volterra integral equati...
In this paper, we introduce a nonresident computer virus model and prove the existence of at least o...
In this paper, a nonlinear integral equation related to infectious diseases is investigated. Namely,...
In this work, we prove the existence of periodic solutions for a seasonally-dependent SIRS model us...
AbstractIn this paper, the simultaneous existence of positive, negative and sign-changing periodic s...
In this paper, a discrete-time SIR epidemic model with nonlinear incidence rate, time delays and imp...
A system of integral equations related to an epidemic model is investigated. Namely, we derive suffi...
AbstractPeriodic solutions for a class of delay integral equations modeling epidemics are shown to b...
AbstractThrough the use of the limiting equation, conditions are given under which a scalar nonlinea...
In this paper we study the existence of periodic solutions of a Volterra type integral equation with...
The existence of a continuous periodic solution of the system x(t)=f(t)+t∫−∞q(t,s,x(s))ds, is studie...
Based on the fixed point index theory for a Banach space, nontrivial periodic solutions are found fo...
In this article, we consider a model for the spread of certain infectious disease governed by a del...
We consider the following model that describes the spread of n types of epidemics which are interdep...
AbstractIn this paper, we study the existence of nontrivial nonnegative periodic solutions for the q...
We study the existence of asymptotically periodic solutions of a nonlinear Volterra integral equati...
In this paper, we introduce a nonresident computer virus model and prove the existence of at least o...
In this paper, a nonlinear integral equation related to infectious diseases is investigated. Namely,...
In this work, we prove the existence of periodic solutions for a seasonally-dependent SIRS model us...
AbstractIn this paper, the simultaneous existence of positive, negative and sign-changing periodic s...
In this paper, a discrete-time SIR epidemic model with nonlinear incidence rate, time delays and imp...
A system of integral equations related to an epidemic model is investigated. Namely, we derive suffi...