A weak law of large numbers for realised covariation in a Hilbert space setting

نویسندگان

چکیده

This article generalises the concept of realised covariation to Hilbert-space-valued stochastic processes. More precisely, based on high-frequency functional data, we construct an estimator trace-class operator-valued integrated volatility process arising in general mild solutions Hilbert space-valued evolution equations sense Da Prato and Zabczyk (2014). We prove a weak law large numbers for this estimator, where convergence is uniform compacts probability with respect Hilbert–Schmidt norm. In addition, determine rates common models spaces.

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ژورنال

عنوان ژورنال: Stochastic Processes and their Applications

سال: 2022

ISSN: ['1879-209X', '0304-4149']

DOI: https://doi.org/10.1016/j.spa.2021.12.011