Which mathematical technique revolutionized e-commerce recommendation systems and is credited with increasing Amazon's revenue by approximately 35% when first implemented?

The retail industry has been transformed by mathematical models and algorithms that optimize everything from inventory management to personalized marketing. Big data analytics in retail relies heavily on mathematical principles to extract valuable insights and drive business decisions. How well do you know the mathematical foundations behind modern retail technology? Test your knowledge about how math shapes the retail landscape!

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Collaborative filtering using matrix factorization
Bayesian probability networks
Markov chain models
Neural network deep learning