Which mathematical algorithm is most commonly used in retail big data systems to develop product recommendation engines?

In today's data-driven retail landscape, mathematics plays a crucial role in analyzing consumer behavior and optimizing sales strategies. Big data analytics has revolutionized how retailers understand their customers and make strategic decisions. This trivia question explores a key mathematical concept that has transformed retail analytics and predictive modeling in recent years. Test your knowledge of how advanced mathematics intersects with modern retail strategy!

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Collaborative filtering with matrix factorization
Euclidean geometry transformations
Laplace transform differential equations
Quaternion rotation algorithms