Mean-field backward stochastic differential equations and related partial differential equations

By Rainer Buckdahn, Juan Li, Shige Peng. 2007

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In [R. Buckdahn, B. Djehiche, J. Li, S. Peng, Mean-field backward stochastic differential equations. A limit approach. Ann. Probab. (2007) (in press). Available online: http://www.imstat.org/aop/future_papers.htm] the authors obtained mean-field Backward Stochastic Differential Equations (BSDE) associated with a mean-field Stochastic Differential Equation (SDE) in a natural way as a limit of a high dimensional system of forward and backward SDEs, corresponding to a large number of "particles" (or "agents"). The objective of the present paper is to deepen the investigation of such mean-field BSDEs by studying them in a more general framework, with general coefficient, and to discuss comparison results for them. In a second step we are interested in Partial Differential Equations (PDE) whose solutions can be stochastically interpreted in terms of mean-field BSDEs. For this we study a mean-field BSDE in a Markovian framework, associated with a McKean-Vlasov forward equation. By combining classical BSDE methods, in particular that of "backward semigroups" introduced by Peng [S. Peng, J. Yan, S. Peng, S. Fang, L. Wu (Eds.), in: BSDE and Stochastic Optimizations; Topics in Stochastic Analysis, Science Press, Beijing (1997) (Chapter 2) (in Chinese)], with specific arguments for mean-field BSDEs, we prove that this mean-field BSDE gives the viscosity solution of a nonlocal PDE. The uniqueness of this viscosity solution is obtained for the space of continuous functions with polynomial growth. With the help of an example it is shown that for the nonlocal PDEs associated with mean-field BSDEs one cannot expect to have uniqueness in a larger space of continuous functions.

Subfields: Finance, Mathematical Physics, Modeling and Simulation

View Paper: https://www.semanticscholar.org/paper/35d6fbcc9b191c388123c17bdd5ef17aa0eb2b99

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The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Finance

  1. P. J. Graber
  2. Jiongmin Yong
  3. Jingrui Sun
  4. Juan Li
  5. Jin Ma
  6. Huyen Pham
  7. Xunjing Li
  8. Shige Peng

In Mathematical Physics

  1. Juan Li
  2. P. J. Graber
  3. X. Mao
  4. Jiongmin Yong
  5. Boualem Djehiche
  6. Rainer Buckdahn
  7. Shige Peng
  8. Jingrui Sun

In Modeling and Simulation

  1. Juan Li
  2. P. J. Graber
  3. X. Mao
  4. Boualem Djehiche
  5. Rainer Buckdahn
  6. Jiongmin Yong
  7. Jin Ma
  8. Shige Peng

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