(Original author Keenan Crane) Originally we set out to develop exterior calculus. The objects we’ve looked at so far — \(k\)-forms, the wedge product \(\wedge\) and the Hodge star \(\star\) — actually describe a more general structure called an exterior algebra. To turn our algebra into a calculus, we also need to know how quantities change, as well as … Continue reading A Quick and Dirty Introduction to Exterior Calculus — Part IV: Differential Operators