Malliavin smoothness of the Rosenblatt process
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866908650522542080 |
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| author | Loosveldt, Laurent Nachit, Yassine Nourdin, Ivan Tudor, Ciprian |
| author_facet | Loosveldt, Laurent Nachit, Yassine Nourdin, Ivan Tudor, Ciprian |
| contents | We investigate the smoothness of the densities of the finite-dimensional distributions of the Rosenblatt process. Within the Malliavin calculus framework, we prove that Rosenblatt random vectors are nondegenerate in the Malliavin sense. As a consequence, their densities belong to the Schwartz space of rapidly decreasing smooth functions. The proof relies on establishing the existence of all negative moments of the determinant of the Malliavin matrix, exploiting the specific structure of random variables in the second Wiener chaos. In addition, we derive exponential-type upper bounds for the partial derivatives of the densities of the finite-dimensional distributions of the Rosenblatt process. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_10299 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Malliavin smoothness of the Rosenblatt process Loosveldt, Laurent Nachit, Yassine Nourdin, Ivan Tudor, Ciprian Probability 0G22, 60G18, 60H07, 60F05 We investigate the smoothness of the densities of the finite-dimensional distributions of the Rosenblatt process. Within the Malliavin calculus framework, we prove that Rosenblatt random vectors are nondegenerate in the Malliavin sense. As a consequence, their densities belong to the Schwartz space of rapidly decreasing smooth functions. The proof relies on establishing the existence of all negative moments of the determinant of the Malliavin matrix, exploiting the specific structure of random variables in the second Wiener chaos. In addition, we derive exponential-type upper bounds for the partial derivatives of the densities of the finite-dimensional distributions of the Rosenblatt process. |
| title | Malliavin smoothness of the Rosenblatt process |
| topic | Probability 0G22, 60G18, 60H07, 60F05 |
| url | https://arxiv.org/abs/2511.10299 |