Walras's law is a fundamental principle of general equilibrium theory stating that the sum of the values of excess demands across all markets must equal zero, which mathematically implies that if all markets but one are in equilibrium, the final market must also clear.
The claim states a standard and foundational microeconomic definition known as Walras's law. None of the retrieved papers specifically address or contest this textbook economic definition; instead, they deal with unrelated topics like satellite forecasting, COVID-19 economic models, and physical wave propagation. Because this is a definitional mathematical/economic identity taught in standard coursework, it falls under common knowledge.