The Layered Transformation Foundations (LTF) Sequence defines the structural architecture required for stable cross‑layer transformation in layered systems. It identifies the operators, mechanisms, and relationships that allow a coherent structure to move upward into higher‑freedom layers and downward into more constrained layers while preserving identity, coherence, and compatibility with each layer’s constraint envelope.
LTF consists of the upward operator (abstraction), the downward operator (compression), the mechanisms that perform them, and the duality that binds them into a coherent system. Together, these components establish the substrate‑agnostic foundations for any layered architecture that requires stable, repeatable, and distortion‑free movement across layers.
The sequence is structurally closed: Papers 1 and 3 define the operators, Papers 2 and 4 define the mechanisms, and Paper 5 defines the duality that relates them.