Abstract
We consider an R d-valued continous semimartingale (X t ) t∃[0, T] , the space of processes G p = {θ · X | θ · X is a semimartingale in S p} and the space of their terminal values G P T . We give necessary and sufficient conditions for completeness of G P in the norm ∥(θ · X)*∥ p and closedness of G P T in L p. These results are related to some problems in mathematical finance and have been given for p=2 in [DMSSS].
Supported by “Fonds zur Förderung der wissenschaftlichen Forschung in Österreich”, Project Nr. P11544
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Grandits, P., Krawczyk, L. (1998). Closedness of some spaces of stochastic integrals. In: Azéma, J., Yor, M., Émery, M., Ledoux, M. (eds) Séminaire de Probabilités XXXII. Lecture Notes in Mathematics, vol 1686. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0101752
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DOI: https://doi.org/10.1007/BFb0101752
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