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| Format: | Preprint |
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2024
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| Online Access: | https://arxiv.org/abs/2409.08920 |
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| _version_ | 1866909315024027648 |
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| author | Zeitler, Samuel |
| author_facet | Zeitler, Samuel |
| contents | Let $ m, n $ be integers such that $ \frac{n}{2} > m \geq 1 $ and let $ (M, g) $ be a closed $ n-$dimensional Riemannian manifold. We prove there exists some $ B \in \mathbb{R} $ depending only on $ (M, g) $, $ m $, and $ n $ such that for all $ u \in H_m^2(M) $, $$ \lVert u \rVert_{2^\#}^2 \leq K(m,n) \int_M (Δ^\frac{m}{2} u)^2 dv_g + B \lVert u \rVert_{H_{m-1}^2(M)}^2 $$ where $ 2^\# = \frac{2n}{n-2m} $, $ K(m,n) $ is the square of the best constant for the embedding $ W^{m,2}(\mathbb{R}^n) \subset L^{2^\#}(\mathbb{R}^n) $, $ H_m^2(M) $ is the Sobolev space consisting of functions on $ M $ with $ m $ weak derivatives in $ L^2(M) $, and $ Δ^\frac{m}{2} = \nabla Δ^{\frac{m-1}{2}} $ if $ m $ is odd. This inequality is sharp in the sense that $ K(m,n) $ cannot be lowered to any smaller constant. This extends the work of Hebey-Vaugon and Hebey which correspond respectively to the cases $ m=1 $ and $ m=2 $. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_08920 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A Sharp Higher Order Sobolev Inequality on Riemannian Manifolds Zeitler, Samuel Analysis of PDEs Let $ m, n $ be integers such that $ \frac{n}{2} > m \geq 1 $ and let $ (M, g) $ be a closed $ n-$dimensional Riemannian manifold. We prove there exists some $ B \in \mathbb{R} $ depending only on $ (M, g) $, $ m $, and $ n $ such that for all $ u \in H_m^2(M) $, $$ \lVert u \rVert_{2^\#}^2 \leq K(m,n) \int_M (Δ^\frac{m}{2} u)^2 dv_g + B \lVert u \rVert_{H_{m-1}^2(M)}^2 $$ where $ 2^\# = \frac{2n}{n-2m} $, $ K(m,n) $ is the square of the best constant for the embedding $ W^{m,2}(\mathbb{R}^n) \subset L^{2^\#}(\mathbb{R}^n) $, $ H_m^2(M) $ is the Sobolev space consisting of functions on $ M $ with $ m $ weak derivatives in $ L^2(M) $, and $ Δ^\frac{m}{2} = \nabla Δ^{\frac{m-1}{2}} $ if $ m $ is odd. This inequality is sharp in the sense that $ K(m,n) $ cannot be lowered to any smaller constant. This extends the work of Hebey-Vaugon and Hebey which correspond respectively to the cases $ m=1 $ and $ m=2 $. |
| title | A Sharp Higher Order Sobolev Inequality on Riemannian Manifolds |
| topic | Analysis of PDEs |
| url | https://arxiv.org/abs/2409.08920 |