Inflation-Phase Transition of Material Space

This paper introduces a physical mechanism for the rapid expansion of the earlyUniverse, replacing the speculative "inflaton field" with the Material Space Theory (MST). We propose that cosmic inflation was a phase transition of a fundamen-tal, primordial substrate. In MST, mass and material space are a single, unified phenomenon: mass cannot exist without the accelerating flow of space, and space cannot exist without its source — mass. Therefore, the emergence of the first par-ticles with rest mass triggered an instantaneous and massive production of material space. This phase transition explains the sudden increase in the Universe’s volume as a tangible physical process, moving beyond the abstract mathematical dogmas of 20th-century physics.