Closed‐Form Solution of the Differential Equation (∂2∂x∂y+ax∂∂x+by ∂∂y+cxy+∂∂t)P=0 Subject to the Initial Condition P(x, y, t = 0) = Φ(x, y)

A closed‐form solution of the differential equation (∂2∂x∂y+ax∂∂x+by ∂∂y+cxy+∂∂t)P=0, subject to the initial condition P(x, y, t = 0) = Φ(x, y), is presented.