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Convergence rates for the full gaussian rough paths

Peter FrizSebastian Riedel — 2014

Annales de l'I.H.P. Probabilités et statistiques

Under the key assumption of finite ρ -variation, ρ [ 1 , 2 ) , of the covariance of the underlying Gaussian process, sharp a.s. convergence rates for approximations of Gaussian rough paths are established. When applied to Brownian resp. fractional Brownian motion (fBM), ρ = 1 resp. ρ = 1 / ( 2 H ) , we recover and extend the respective results of ( (2009) 2689–2718) and ( (2012) 518–550). In particular, we establish an a.s. rate k - ( 1 / ρ - 1 / 2 - ε ) , any ε g t ; 0 , for Wong–Zakai and Milstein-type approximations with mesh-size...

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