Geodesic
Inverting the signature of a path
Journal of the European Mathematical Society, Tome 20 (2018) no. 7, pp. 1655-1687 Cet article a éte moissonné depuis la source EMS Press

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The aim of this article is to develop an explicit procedure that enables one to reconstruct any C1 path (at natural parametrization) from its signature. We also explicitly quantify the distance between the reconstructed path and the original path in terms of the number of terms in the signature that are used for the construction and the modulus of continuity of the derivative of the path. A key ingredient in the construction is the use of a procedure of symmetrization that separates the behaviour of the path at small and large scales.
DOI : 10.4171/jems/796
Classification : 70-XX, 93-XX
Keywords: Signature, inversion, symmetrization 
@article{JEMS_2018_20_7_a3,
     author = {Terry J. Lyons and Weijun Xu},
     title = {Inverting the signature of a path},
     journal = {Journal of the European Mathematical Society},
     pages = {1655--1687},
     year = {2018},
     volume = {20},
     number = {7},
     doi = {10.4171/jems/796},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/796/}
}
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Terry J. Lyons; Weijun Xu. Inverting the signature of a path. Journal of the European Mathematical Society, Tome 20 (2018) no. 7, pp. 1655-1687. doi: 10.4171/jems/796

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