Local Times for Continuous Paths of Arbitrary Regularity
Local Times for Continuous Paths of Arbitrary Regularity
复制标题
任意规则连续路径的当地时间
DOI:
10.1007/s10959-022-01159-z
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发表时间:
2022
影响因子:
0.8
通讯作者:
Kim, Donghan
中科院分区:
文献类型:
--
作者:
Kim, Donghan
We study a pathwise local time of even integer order, defined as an occupation density, for continuous functions with finitepth variation along a sequence of time partitions. With this notion of local time and a new definition of the Föllmer integral, we establish Tanaka-type change-of-variable formulas in a pathwise manner. We also derive some identities involving this high-order pathwise local time, each of which generalizes a corresponding identity from the theory of semimartingale local time. We then use collision local times between multiple functions of arbitrary regularity to study the dynamics of ranked continuous functions.
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DOI:
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