On the Theory of Relative Duality v9

This preprint introduces Relative Duality, a relational framework in which no fundamental background, descriptive role, or external law is physically preferred. The work formulates the theory through role-exchange symmetry, mutual-commutant structure, and a finite dynamical-graph extension. It presents exact algebraic results, candidate propagating and localized modes, and conditional routes toward continuum physics, while clearly distinguishing established model consequences from open physical identifications. The manuscript is a theoretical research preprint and has not yet been peer reviewed.