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… martingale validation
- Changed epsilon from time-varying vector to single scalar parameter (matches Roland's original design) - Only theta(t) is PCHIP interpolated, epsilon remains constant - Reduced calibration from 32 params to 17 params (16 theta + 1 epsilon) - Updated visualization to show horizontal line for constant epsilon - Fixed all related functions and charts to handle scalar epsilon
…emove moved notebooks
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Calibration of vol surface for key rate caplets using affine multi-curve model