A framework where nothing is fundamental — except differentiation itself.
ISE replaces the ontology of substance with an ontology of relation. Rather than searching for elementary building blocks or postulating a pre-existing spacetime fabric, it proposes that all physical phenomena emerge as projections of a singular process: differentiation across scales. This founds an entirely new category of theoretical physics — Scale-Relational Physics (Skalenrelationale Physik).
Scale is not large or small. It is the unity of relational position and differentiation capacity — what a structure can distinguish defines what it is. Coherence is not a product of this process but its precondition. And the speed of light is not a velocity limit but the irreducible rate of dependency update.
ISE is the only theoretical framework that describes itself as an emergent product of the same process it postulates. It does not stand outside its subject matter. It arises from within it.
A recurring pattern across every critical engagement with ISE: even those who reject its conclusions concede its originality and inspirational force. The framework consistently opens conceptual doors that remain productive regardless of whether one accepts the ontology behind them.
ISE develops its own mathematical language — Scale-Relational Mathematics (SRM) — because no existing formalism captures scale-relational structure. SRM treats ratios as primitive, scale transformations as fundamental, and introduces S-weights (dependency depth relative to the photon as torsor origin), resonance closure conditions, and a scale-covariant derivative. The frequency domain is not a choice of representation but the necessary consequence of the ontology.