RT journal article T1 A case study of 2019-nCOV cases in Argentina with the real data based on daily cases from March 03, 2020 to March 29, 2021 using classical and fractional derivatives A1 Kumar, Pushpendra A1 Ertuk, V. S. A1 Murillo Arcila, Marina A1 Banerjee, R. A1 Manickam, A. A2 Matemáticas K1 COVID-19 K1 Argentina K1 Mathematical models K1 TRR algorithm K1 Atangana-Baleanu non-classical derivative AB In this study, our aim is to explore the dynamics of COVID-19 or 2019-nCOV in Argentinaconsidering the parameter values based on the real data of this virus from March 03; 2020to March 29; 2021 which is a data range of more than one complete year. We propose aAtangana-Baleanu type fractional order model and simulate it by using Predictor-Corrector(P-C) method. First we introduce the biological nature of this virus in theoretical way andthen formulate a mathematical model to define its dynamics. We use a well-known effectiveoptimization scheme based on renowned trust-region-reflective (TRR) method to performthe model calibration. We have plotted the real cases of COVID-19 and compared ourinteger-order model with the simulated data along with the calculation of basic reproductivenumber. Concerning fractional order simulations,  first we prove the existence and uniquenessof solution and then write the solution along with the stability of the given P-C method.Number of graphs at various fractional-order values are simulated to predict the futuredynamics of the virus in Argentina which is the main contribution of this paper. PB Springer SN 1687-1847 YR 2021 FD 2021 LK http://hdl.handle.net/10498/35357 UL http://hdl.handle.net/10498/35357 LA eng DS Repositorio Institucional de la Universidad de Cádiz RD 10-may-2026