Structural Differentiation Cosmology (SDC): An Irreversible Universe Model Based on the Impossibility of Nothingness

This work proposes Structural Differentiation Cosmology (SDC), a theoretical frameworkbased on the premise that “nothingness cannot exist.”The universe is modeled as a closed system without external reference,where cosmic evolution is described not as creation of new entitiesbut as irreversible internal reconfiguration of existing structure. A central variable, structural density C(t), is introduced to representthe degree of differentiation within the universe.Cosmic expansion and acceleration emerge as observational projectionsof changes in structural density rather than physical expansion of space. This framework provides an alternative interpretation of dark energy–like phenomenawithout introducing additional entities, and emphasizes irreversibilityand non-convergent evolution as fundamental properties of the universe.