## Elementary proofs of analytic hypoellipticity for a wave operator and the (partial d)–Neumann problem.(English)Zbl 0497.35023

Astérisque 89-90, 85-116 (1981).
For the entire collection see [Zbl 0481.00013].

### MSC:

 35H10 Hypoelliptic equations 35N15 $$\overline\partial$$-Neumann problems and formal complexes in context of PDEs

### Citations:

Zbl 0456.35019; Zbl 0455.35040