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Stochastic Processes and their Applications
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Stochastic Processes and their Applications
Article . 2016 . Peer-reviewed
License: Elsevier Non-Commercial
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Article . 2016
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https://dx.doi.org/10.48550/ar...
Article . 2013
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Discretely sampled signals and the rough Hoff process

Authors: Guy Flint; Ben Hambly; Terry Lyons;

Discretely sampled signals and the rough Hoff process

Abstract

We introduce a canonical method for transforming a discrete sequential data set into an associated rough path made up of lead-lag increments. In particular, by sampling a $d$-dimensional continuous semimartingale $X:[0,1] \rightarrow \mathbb{R}^d$ at a set of times $D=(t_i)$, we construct a piecewise linear, axis-directed process $X^D: [0,1] \rightarrow\mathbb{R}^{2d}$ comprised of a past and future component. We call such an object the Hoff process associated with the discrete data $\{X_{t}\}_{t_i\in D}$. The Hoff process can be lifted to its natural rough path enhancement and we consider the question of convergence as the sampling frequency increases. We prove that the It�� integral can be recovered from a sequence of random ODEs driven by the components of $X^D$. This is in contrast to the usual Stratonovich integral limit suggested by the classical Wong-Zakai Theorem. Such random ODEs have a natural interpretation in the context of mathematical finance.

Country
United Kingdom
Keywords

Probability (math.PR), Martingales with continuous parameter, lead-lag path, Itō-Stratonovich correction, Stochastic ordinary differential equations (aspects of stochastic analysis), Hoff process, rough path theory, FOS: Mathematics, Wong-Zakai approximations, Sample path properties, Mathematics - Probability, Signal detection and filtering (aspects of stochastic processes)

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
23
Top 10%
Top 10%
Top 10%
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