Stability of Weighted Norm Inequalities
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2022
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| _version_ | 1866917690879246336 |
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| author | Alexis, Michel Garcia, José Luis Luna Sawyer, Eric Uriarte-Tuero, Ignacio |
| author_facet | Alexis, Michel Garcia, José Luis Luna Sawyer, Eric Uriarte-Tuero, Ignacio |
| contents | We show that while individual Riesz transforms are two weight norm stable under biLipschitz change of variables on $A_{\infty}$ weights, they are two weight norm unstable under even rotational change of variables on doubling weights. More precisely, we show that individual Riesz transforms are unstable under a set of rotations having full measure, which includes rotations arbitrarily close to the identity. This provides an operator theoretic distinction between $A_{\infty}$ weights and doubling weights.
More generally, all iterated Riesz transforms of odd order are rotationally unstable on pairs of doubling weights, thus demonstrating the need for characterizations of iterated Riesz transform inequalities using testing conditions for doubling measures, as opposed to the typically stable 'bump' conditions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2208_08400 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Stability of Weighted Norm Inequalities Alexis, Michel Garcia, José Luis Luna Sawyer, Eric Uriarte-Tuero, Ignacio Classical Analysis and ODEs 42B20 We show that while individual Riesz transforms are two weight norm stable under biLipschitz change of variables on $A_{\infty}$ weights, they are two weight norm unstable under even rotational change of variables on doubling weights. More precisely, we show that individual Riesz transforms are unstable under a set of rotations having full measure, which includes rotations arbitrarily close to the identity. This provides an operator theoretic distinction between $A_{\infty}$ weights and doubling weights. More generally, all iterated Riesz transforms of odd order are rotationally unstable on pairs of doubling weights, thus demonstrating the need for characterizations of iterated Riesz transform inequalities using testing conditions for doubling measures, as opposed to the typically stable 'bump' conditions. |
| title | Stability of Weighted Norm Inequalities |
| topic | Classical Analysis and ODEs 42B20 |
| url | https://arxiv.org/abs/2208.08400 |