Which mathematical algorithm, initially developed for academic purposes, revolutionized retail product recommendation systems and is now used by major mathematics education platforms?

The retail world has been transformed by mathematical algorithms that enhance customer experiences and optimize operations. One particular breakthrough stands out for revolutionizing how mathematics is applied to retail problems. This trivia question explores a significant mathematical innovation that changed how retailers approach customer data and product recommendations.

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Singular Value Decomposition (SVD), which powers collaborative filtering systems to identify patterns in user preferences
Random Forest algorithms, which classify customers based on purchase history and demographic data
Gradient Descent optimization, which dynamically adjusts pricing based on demand forecasting
K-means clustering, which segments mathematical product users by proficiency and learning style