A Systematic Review on the Solution Methodology of Singularly Perturbed Differential Difference Equations

This review paper contains computational methods or solution methodologies for singularly perturbed differential difference equations with negative and/or positive shifts in a spatial variable. survey limits its coverage to singular perturbation arising the modeling of neuronal activity and developed by numerous researchers between 2012 2022. The covered ordinary delay small large shift(s), differential–differential mixed partial shift(s) differential–difference type. main aim this is find out what numerical asymptotic were last ten years solve such problems. Further, it aims stimulate develop new robust solving families problems under consideration.