The ellipticity principle for the 3-D steady potential flow in conical coordinates

DOI10.1360/SSM-2020-0142zbMath1499.35402MaRDI QIDQ5064321

Bingsong Long, Chao Yi

Publication date: 21 March 2022

Published in: SCIENTIA SINICA Mathematica (Search for Journal in Brave)

zbMATH Keywords

mixed type equationdegenerate boundary3-D steady potential flowellipticity principleparabolic-elliptic region

Mathematics Subject Classification ID

Boundary value problems for second-order elliptic equations (35J25) Degenerate elliptic equations (35J70) Hyperbolic conservation laws (35L65) Existence, uniqueness, and regularity theory for compressible fluids and gas dynamics (76N10)

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