The notion of solution plays a crucial role in the conceptual system of Léon Walras, the founder of General Equilibrium Theory (GET). In this paper, after introducing the two solution concepts employed by Walras in the development of his version of GET, respectively called the "theoretical" and...

Walras' theory of general economic equilibrium undergoes deep changes over the twenty-six years elapsing from the date when Walras' first significant theoretical contribution is published (1874) and the date when the fourth edition of his fundamental work, the Eléments d'économie politique...