An Introduction to the d'Alembert System

By Nicholas Colon

The d’Alembert system, also called the montant et demontant system (a French phrase that translates to upwards and downwards), is named after the French mathematician Jean le Rond d’Alembert. The system is based on the mathematical theory of equilibrium devised by d’Alembert in the 18th century. The d’Alembert mathematical equilibrium theory states that, over the long run each of the outcomes in of a near 50/50 game will come up an equal number of times. Here, I will evaluate how the system works as well as the overall effectiveness of the system as well as what additional tactics can be used to increase the efficacy of the system.

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