A long overdue distinction between so-called variant and invariant complex potentials is proposed here for the first time. Invariant complex potentials describe physical flows where a switch of the real and imaginary parts of the function will still describe the same type of physical flow (but only rotated by π/2). Such invariants can be formulated with Euler’s formula to d... https://safeersappliancers.shop/product-category/aeg-bpk842720m-electric-single-stainless-steel-pyrolytic-oven/