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bellman function 1isoperimetric profile 1martingale isoperimetry 1n-adic filtration 1sharp lower bounds 1takagi function 1

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math.PR2026

Sharp Ternary Martingale Isoperimetry and -adic Takagi-Type Lower Bounds

Natanael Alpay

The paper computes the exact isoperimetric profile for the ternary (3‑adic) martingale filtration on [0,1) and establishes sharp logarithmic lower bounds and endpoint L^α estimates…