[MST-EUT Theory Series #13] First-Principles Derivation of the Fine-Structure Constant - MST-EUT精細結構常數的第一性推導 (v1.2-zh)

This document presents a first-principles derivation of the fine-structure constant within the Mass–Space–Time Entanglement Unified Theory (MST–EUT). Starting from entropy flow rigidity and topological closure conditions, the dimensionless electromagnetic coupling constant is derived without invoking quantum electrodynamics postulates. The fine-structure constant emerges as a geometric ratio governed by entropic flow parameters and topological constraints, providing a structural interpretation of its numerical value. This work establishes a direct link between fundamental constants and entropy-flow-based field geometry. 本文為 MST-EUT 理論系列第十三份文檔,從第一性原理推導精細結構常數的起源與數值意義。本文不依賴量子電動力學的既有假設,而是由熵流剛度、拓撲封閉條件與無量綱比值出發,將精細結構常數視為熵流場幾何結構的必然結果。此推導建立自然常數與熵流拓撲結構之間的直接連結,賦予其清晰的物理與幾何詮釋。