Incremental computation of block triangular matrix exponentials with application to option pricing

@article{Kressner2017IncrementalCO,
  title={Incremental computation of block triangular matrix exponentials with application to option pricing},
  author={D. Kressner and R. Luce and Francesco Statti},
  journal={arXiv: Numerical Analysis},
  year={2017}
}
We study the problem of computing the matrix exponential of a block triangular matrix in a peculiar way: Block column by block column, from left to right. The need for such an evaluation scheme arises naturally in the context of option pricing in polynomial diffusion models. In this setting a discretization process produces a sequence of nested block triangular matrices, and their exponentials are to be computed at each stage, until a dynamically evaluated criterion allows to stop. Our… Expand
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