“…From several results in recent years, starting with Hörmander's characterization of the constant coefficient partial differential equations P (D)u = f that have a real analytic solution u for every real analytic function f , it has become clear that certain properties of the partial differential operator P (D) are equivalent to estimates of Phragmén-Lindelöf type for plurisubharmonic functions on the algebraic variety V = V (P ) := z ∈ C n : P (z) = 0 (see Hörmander [15], Zampieri [32], Kaneko [16], [17], Braun, Meise and Vogt [7], [8], Braun [3], [4], Meise, Taylor and Vogt [19], [20], [21], [23], [25], Palamodov [30] and Momm [28]). There are several different such estimates that are of interest, corresponding to different properties of the operator, e.g.…”