Yelken Theory - Formal Core v1.0

In this document, I present the formal core of the Yelken Theory – the first mathematical formulation of a hypothesis I initially outlined in April 2025. The theory explores the idea that gravitation may be understood not as a fundamental interaction, but as an emergent effect of structured electromagnetic order and resonance. This work defines the scalar field called Y(x), introduces the associated Lagrangian density, derives the field equation, and provides a covariant equation of motion for test bodies. The mathematical structure is consistent with relativistic field theory and offers an alternative conceptual pathway to gravitational effects. The content builds upon my original idea paper, which served as a timestamp and hypothesis outline. This document now establishes a solid foundation for future theoretical and experimental exploration.