How big is infinity? – Dennis Wildfogel

View full lesson: http://ed.ted.com/lessons/how-big-is-infinity

Using the fundamentals of set theory, explore the mind-bending concept of the “infinity of infinities” — and how it led mathematicians to conclude that math itself contains unanswerable questions.

Lesson by Dennis Wildfogel, animation by Augenblick Studios.

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