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- W2406809191 abstract "This contribution is an extension of the work initiated in [1], presenting a strategy for the calibration of the local volatility. Due to Morozov's discrepancy principle [6], the Tikhonov regularization problem introduced in [7] is understood as an inequality-constrained minimization problem. An Uzawa procedure is proposed to replace this latter by a sequence of unconstrained problems dealt with in the modified Thikonov regularization procedure in [1]. Numerical tests confirm the consistency of the approach and the significant speed-up of the process of local volatility determination. Cette contribution dans ce papier est une extension des travaux initiés dans [1], qui pré-sente une stratégie pour l'estimation de la volatilité locale. En raison du principe de la différence de Morozov [6], le problème de la régularisation de Tikhonov introduite dans [7] est reformulé comme un problème de minimisation de l'inégalité des contraintes. Une procédure Uzawa est proposé de remplacer ce dernier par une séquence de problèmes non contraints traités dans la procédure de régularisation Thikonov modifié dans [1]. Des tests numériques confirment la cohérence de l'approche et l'importante accélérer le processus de détermination de la volatilité locale." @default.
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- W2406809191 date "2016-12-13" @default.
- W2406809191 modified "2023-10-17" @default.
- W2406809191 title "An alternative algorithm for regularization of noisy volatility calibration in Finance" @default.
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- W2406809191 doi "https://doi.org/10.46298/arima.1492" @default.
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