Forbes contributors publish independent expert analyses and insights. Chris Walton is a Target executive-turned reporter who covers retail. Value is one of the most important terms in retail.

Absolute value equations (AVEs), characterised by the inclusion of absolute value functions in the variables, present inherently non‐smooth and computationally challenging problems that are often ...

Elliptic equations represent a fundamental class of partial differential equations that arise in numerous models of steady-state processes, ranging from heat conduction to elasticity. Their study ...