This document may be downloaded, read, stored and printed for your own use within the limits of § 53 UrhG but it may not be distributed via the internet or passed on to external parties.Dieses Dokument darf im Rahmen von § 53 UrhG zum eigenen Gebrauch kostenfrei heruntergeladen, gelesen, gespeichert und ausgedruckt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.Diehl, JoschaEbrahimi-Fard, KuruschTapia, Nikolas2022-06-302022-06-302020https://oa.tib.eu/renate/handle/123456789/9410https://doi.org/10.34657/8448Driven by the need for principled extraction of features from time series, we introduce the iterated-sums signature over any commutative semiring. The case of the tropical semiring is a central, and our motivating, example, as it leads to features of (real-valued) time series that are not easily available using existing signature-type objects.eng510Time series analysistime warpingtropical quasisymmetric functionssemiringsReport25 S.