Dual-Layer Light Invariance: The Open-Close Structure of Ma — Paper 1 of 3D Theory Series

This paper is part of the TheYKHC Theoretical Series: 'From Duality to Field: A Three-Dimensional Evolution of Universal Theory' Paper 1 (DOI: 10.5281/zenodo.20956491): Dual-Layer Light Invariance (2D — The Discovery of Duality) Paper 2 (DOI: 10.5281/zenodo.20956493): Why Spacetime is (3+1)-Dimensional (2.5D — Polygon Transcendence) Paper 3 (DOI: 10.5281/zenodo.20956499): Ki-Net Field Evidence (3D — Universal Field Completion) Foundation (DOI: 10.5281/zenodo.20955834): Genki Particle Dance — Why the Quantum Foam Dances V = N / D governs reality from the quantum vacuum to the cosmic scale. [Paper 1 — 2D: Discovery of Duality] Light is simultaneously wave and particle. This is not a paradox — it is the signature of a dual-layer universe governed by V = N / D. The Open-Close Structure of Ma (間) is the fundamental mechanism behind wave-particle duality. Phi2 perturbation is its mathematical expression.