Sig-DFP for MFG with Common Noise A. Preliminaries on Rough Path Theory and Signatures
Sig-DFP for MFG with Common Noise A. Preliminaries on Rough Path Theory and Signatures
复制标题
用于具有常见噪声的 MFG 的 Sig-DFP A. 粗糙路径理论和签名的预备知识
DOI:
10.2139/ssrn.3623086
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
T. Zariphopoulou
中科院分区:
文献类型:
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作者:
Ruimeng Hu;T. Zariphopoulou
In this appendix, we shall follow Lyons & Qian (2002); Lyons et al. (2007); Friz & Victoir (2010) and briefly introduce rough path theory and signatures. We will also give the proof of Lemma 4.1 using the factorial decay property of signatures. Denote by ∆T the simplex {(s, t) ∈ [0, T ] : 0 ≤ s ≤ t ≤ T}, and by T(R) = ⊕n k=0(R) ⊗ k the truncated tensor algebra. Definition A.1 (Multiplicative Functional). LetX : ∆T → T(R), with n ≥ 1 as an integer. For each (s, t) ∈ ∆T ,Xs,t denotes the image of (s, t) under the mappingX, and we write