EN
Let (x,y,z) ∈ ℂ³. In this paper we shall study the solvability of singular first order partial differential equations of nilpotent type by the following typical example:
$Pu(x,y,z): = (y∂_x - z∂_y)u(x,y,z) = f(x,y,z) ∈ 𝒪_{x,y,z}$,
where
$P = y∂_x - z∂_y: 𝒪_{x,y,z} → 𝒪_{x,y,z}$.
For this equation, our aim is to characterize the solvability on $𝒪_{x,y,z}$ by using the Im P, Coker P and Ker P, and we give the exact forms of these sets.