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Zur Theorie der Randwertprobleme für Gleichungen gemischten Typs im Raum. (Russian) Zbl 0358.35053


MSC:

35M99 Partial differential equations of mixed type and mixed-type systems of partial differential equations
35D05 Existence of generalized solutions of PDE (MSC2000)
35J25 Boundary value problems for second-order elliptic equations
35J10 Schrödinger operator, Schrödinger equation
35B45 A priori estimates in context of PDEs
35K20 Initial-boundary value problems for second-order parabolic equations
35L20 Initial-boundary value problems for second-order hyperbolic equations
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