Which mathematician founded the e-commerce platform 'Brilliant.org' that specializes in interactive mathematics and science courses?

The intersection of mathematics and e-commerce has produced revolutionary platforms and tools. Mathematicians have played crucial roles in developing algorithms that power recommendation systems, optimize supply chains, and create predictive analytics models used by major online retailers. This poll tests your knowledge about a notable mathematician who ventured into the e-commerce world and created a platform that transformed online education in mathematics.

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Sue Khim, former International Mathematical Olympiad participant
Andrew Wiles, prover of Fermat's Last Theorem
Terence Tao, Fields Medal winner and polymath
Grigori Perelman, solver of the Poincaré conjecture