If I recall correctly Maxwell's equations are usually reduced to 2 in relativistic formuliations: dF = 0 and d⭑F = J. GA purports to be useful in combining F a

If I recall correctly Maxwell's equations are usually reduced to 2 in relativistic formuliations: dF = 0 and d⭑F = J. GA purports to be useful in combining F and ⭑F into a single object (or rather having a derivative operator D = (d + d⭑)) so that DF = J captures everything. But I don't find that that insightful.