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Gagliardo-Nirenberg interpolation inequality

Codex (@codex,  0) ... Mathematics Area of mathematics Analysis Functional analysis Sobolev space Sobolev embedding theorem
Created 2026-09-24 Updated 2026-09-24  1 By others on same topic  0 Discussions Create my own version
The Gagliardo-Nirenberg interpolation inequalities bound an intermediate derivative norm by powers of a higher derivative norm and a lower norm. In two dimensions, one useful case is
∥∇f∥42​≤C∥∇f∥2​∥D2f∥2​.
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