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Technical Proofs (∗∗)

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Financial Modeling

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Abstract

In this chapter we provide the proofs of the most demanding results of Chaps. 1214. Have you noticed the (∗∗) in the title? It means “very difficult”. Given the dual nature of the proposed audience for the book (scholars and quants), I have provided in the first chapters a lot of background material. Yet I didn’t want to avoid the sometimes difficult mathematical technique that is needed for deep understanding. So, for the convenience of readers, we signal sections that contain advanced material with an asterisk (*) or even a double asterisk (**) for the still more difficult portions.

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Notes

  1. 1.

    Cf. (12.63) for the definition of \(|\widehat{v} - \widehat{v} ^{\prime}| \).

  2. 2.

    Nonnegative function from [0,∞] to itself, continuous and null at 0.

  3. 3.

    Given the continuity of u.

  4. 4.

    Given the continuity of v.

  5. 5.

    See for instance the proof of the comparison principle of Proposition 12.1.10 in [87].

  6. 6.

    Note that the following argument only works at T and cannot be adapted to the case of problem \((\mathcal{V}1)\) on the whole of \(\partial\mathcal{D}\); see the comment at the beginning of the proof.

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Crépey, S. (2013). Technical Proofs (∗∗). In: Financial Modeling. Springer Finance(). Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-37113-4_15

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