Dark Matter and Cosmic Vacuum Two States of the Same Substance.

This paper presents a structural cosmological model that defines dark matter and cosmic vacuum within a single framework based on massive membranes and energy strings. The central idea is that dark matter and cosmic vacuum are not independent entities, but two phases of the same geometry: a single structure of massive membranes, contracted in one phase (dark matter) and open in another phase (cosmic vacuum), supported by temporal-energy strings that represent dark energy. The model organizes this on the basis of three distinct space-time patterns. Each pattern has its own structural content and effective laws, while preserving the condition that Pattern 1 inside galaxies remains conventional Einsteinian-quantum space-time, whereas what we call "vacuum," "dark matter," and "dark energy" are reformulated in Patterns 2 and 3.