Variational Closure
Definition
Variational closure is an architectural invariant in which a block receives a variational representation and returns a variational representation without silently collapsing uncertainty into a deterministic point.
Research perspective
For attention and other composite mechanisms, closure can be maintained through explicit probabilistic transformations and moment projection, with assumptions and approximations reported as part of the architecture.
This page provides a concise orientation. The linked publications contain the formal definitions, experimental protocols, results and limitations.