Notwithstanding the impact that the Coronavirus pandemic has had on the physical and
psychological wellness of people, it has also caused a change in the psychological …

The current study presents the numerical solutions of a fractional order monkeypox virus
model. The fractional order derivatives in the sense of Caputo are applied to achieve more …

This article introduces a discrete-time fractional variable order over a SEIQR model,
incorporated for COVID-19. Initially, we establish the well-possedness of solution. Further …

We investigate the regional gradient observability of fractional sub-diffusion equations
involving the Caputo derivative. The problem consists of describing a method to find and …

Recent outbreak of Covid-19 disease has impacted the global economy negatively due to
diminished productivity, loss of life, business closures, trade disruption, and obliteration of …

This paper develops a fractional-order model of COVID-19 with vaccination. The model is
well designed by including both the efficacy and inefficacy of vaccinations in humans …

In this paper, we investigate the concept of regional enlarged observability (ReEnOb) for
fractional differential equations (FDEs) with the Hilfer derivative. To proceed this, we develop …

The essence of mathematical tools used to exemplify the practical problems that exist in
daily life is as old as the world itself. Mathematical models in science and technology have …

In this paper, the time fractional diffusion equations optimal control problem is solved by 3− α
order with uniform accuracy scheme in time and finite element method (FEM) in space. For …

In the current study, we develop and analyze a Caputo derivative-based fractional-order SIR-
type epidemic model. The exact value of the basic reproduction number and its importance …