- a home page for the AXIOM OF CHOICE (math.vanderbilt.edu)
The Axiom of Choice (AC) was formulated about a century ago, and it was controversial for a few of decades after that; it might be considered the last great controversy of mathematics. It is now a basic assumption used in many parts of mathematics.
- David O. Sacks (Wikipedia)
David Oliver Sacks (born May 25, 1972) is a South African-American entrepreneur, author, and investor in internet technology firms. He is a general partner of Craft Ventures, a venture capital fund he co-founded in late 2017. Additionally, he is a co-host of the All In podcast, alongside Chamath Palihapitiya, Jason Calacanis and David Friedberg. Previously, Sacks was the COO and product leader of PayPal, and founder and CEO of Yammer. In 2016, he became interim CEO of Zenefits for ten months. In 2017, Sacks co-founded Craft Ventures, an early-stage venture fund. His angel investments include Facebook, Uber, SpaceX, Palantir Technologies, and Airbnb.