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carleman estimates 1fractional Schrödinger equation 1Grushin operator 1Landis estimate 1quarter Laplacian 1spectral analysis 1

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math.AP2026

A Critical Quantitative Landis Estimate for the One-Dimensional Quarter-Laplacian

Adham Gudaimat

The paper proves a quantitative Landis-type lower bound for solutions of the one‑dimensional fractional Schrödinger equation with the quarter‑Laplacian, showing that nontrivial sol…