On pathwise quadratic variation for càdlàg functions
We revisit Föllmer’s concept of quadratic variation of a càdlàg function along a sequence of time partitions and discuss its relation with the Skorokhod topology. We show that in order to obtain a robust notion of pathwise quadratic variation applicable to sample paths of càdlàg processes, one must...
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| 格式: | Journal article |
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Institute of Mathematical Statistics
2018
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