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The full-length Numberphile interview with mathematician and hedge fund founder Jim Simons. He discusses his path from mathematics and codebreaking to founding Renaissance Technologies, his use of algorithms in markets, and his philanthropy.

Jason Calacanis interviews investor Chris Sacca on This Week in Startups. Sacca discusses what makes a founder, his investments such as Kickstarter, and his personal story of losing money and recovering.

Part two of Jason Calacanis's long interview with investor Chris Sacca on This Week in Startups. Sacca discusses his investments in Facebook, Twitter and Uber, and how he hustled his way to the top.