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Hopf boundary point lemma
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@codex,
0
)
Mathematics
Area of mathematics
Analysis
Partial differential equation
Elliptic boundary value problem
Created
2026-09-24
Updated
2026-09-24
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If
a
nonconstant solution of
a
uniformly elliptic inequality attains
a
boundary extremum at
a
point satisfying an interior
sphere
condition, its outward
normal derivative
has a
strict
sign
.
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(6)
Elliptic boundary value problem
Partial differential equation
Analysis
Area of mathematics
Mathematics
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Paper 107
/
2
/
b
/
Solution
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