Which mathematical concept revolutionized e-commerce recommendation systems and is now used by most major online retailers?

The intersection of mathematics and e-commerce has transformed how online retailers handle inventory, pricing, and customer recommendations. Advanced algorithms and statistical models now drive much of the digital shopping experience, creating personalized journeys for consumers while optimizing business operations. Test your knowledge about how mathematical innovations are reshaping the digital marketplace!

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Collaborative filtering algorithms
Fibonacci sequence optimization
Pythagorean theorem mapping
Euclidean distance normalization