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On the denseness of the subset of discrete distributions in a certain set of two-dimensional distributions
Volume 9, Issue 3 (2022), pp. 265–277
Dmitriy Borzykh ORCID icon link to view author Dmitriy Borzykh details   Alexander Gushchin ORCID icon link to view author Alexander Gushchin details  

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https://doi.org/10.15559/22-VMSTA204
Pub. online: 25 March 2022      Type: Research Article      Open accessOpen Access

Received
1 December 2021
Accepted
16 March 2022
Published
25 March 2022

Abstract

In the article [Theory of Probability & Its Applications 62(2) (2018), 216–235], a class $\mathbb{W}$ of terminal joint distributions of integrable increasing processes and their compensators was introduced. In this paper, it is shown that the discrete distributions lying in $\mathbb{W}$ form a dense subset in the set $\mathbb{W}$ for ψ-weak topology with a gauge function ψ of linear growth.

References

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Borzykh, D.A.: Joint distributions of generalized integrable increasing processes and their generalized compensators. Theory Probab. Appl. (2022).
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Cox, A.M.G., Kinsley, S.M.: Discretisation and duality of optimal Skorokhod embedding problems. Stoch. Process. Appl. 129(7), 2376–2405 (2019). MR3958436. https://doi.org/10.1016/j.spa.2018.07.008
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Föllmer, H., Schied, A.: Stochastic Finance. An introduction in discrete time. De Gruyter Graduate. Fourth revised and extended edition of [MR1925197]. De Gruyter, Berlin (2016). 596 pp. MR3859905. https://doi.org/10.1515/9783110463453
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Gushchin, A.A.: The joint law of terminal values of a nonnegative submartingale and its compensator. Theory Probab. Appl. 62(2), 216–235 (2018). MR3649035. https://doi.org/10.1137/S0040585X97T988575
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Gushchin, A.A.: Single jump filtrations and local martingales. Mod. Stoch. Theory Appl. 7(2), 135–156 (2020). MR4120612
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Gushchin, A.A.: The joint law of a max-continuous local submartingale and its maximum. Theory Probab. Appl. 65(4), 545–557 (2021). MR4167880. https://doi.org/10.4213/tvp5339
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Resnick, S.I.: Heavy-tail Phenomena. Probabilistic and statistical modeling. Springer Series in Operations Research and Financial Engineering. Springer (2007), 404 pp. MR2271424
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Rogers, L.C.G.: The joint law of the maximum and terminal value of a martingale. Probab. Theory Relat. Fields 95(4), 451–466 (1993). MR1217446. https://doi.org/10.1007/BF01196729

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Keywords
Increasing process compensator terminal joint distribution Doob–Meyer decomposition dense set of distributions

MSC2010
60G44 60G07

Funding
The article was prepared within the framework of the Basic Research Program at HSE University.

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