Lie Symmetry Methods for Time-Fractional Option Pricing: Similarity Reductions, Mittag–Leffler Propagators, and Rough-Volatility Diagnostics
We formulate a dimensionally consistent time-fractional Black–Scholes model through inverse-stable subordination. A product pricing measure fixes the clock law and operational numeraire, while clock risk remains unspanned. The physical memory intensity is κα=t01-α\documentclass[12pt]{minimal} \usepackage{amsmath} \usep...