Introduction to Functional Data Analysis

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Wasserstein autoregressive models for density time series (2020, background): “…the image of under this map is a convex cone in f⊕, so it is not immediately possible to impose onto the tangent space standard structures used for functional time series, which rely on linearity of the function space (see e.g., Chapter 8 of Kokoszka and Reimherr (2017) and references therein).”
Long-Range Dependent Curve Time Series (2020, unknown): “Following Aue, Horváth, and Pellatt (2017) and Kokoszka and Reimherr (2017), we introduce the intraday log-returns Xt(u) = ln SPt(u) − ln SPt(u − h), (5.1) where h is a time window typically chosen as 1, 5, or 15 min.”