Which mathematical technique revolutionized e-commerce by enabling product recommendation systems that significantly increased cross-selling success rates?

In today's data-driven retail environment, mathematics plays a crucial role in optimizing sales strategies and understanding consumer behavior. Advanced statistical models and algorithms help retailers make informed decisions about pricing, inventory management, and customer targeting. This poll tests your knowledge of how mathematical concepts are applied in modern retail analytics to drive sales and customer loyalty.

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Collaborative filtering algorithms
Differential calculus
Euclidean geometry
Boolean algebra