Brian Greene

American theoretical physicist and string theorist. Greene has worked on mirror symmetry, relating two different Calabi–Yau manifolds (concretely, relating the conifold to one of its orbifolds). He also described the flop transition, a mild form of topology change, showing that topology in string theory can change at the conifold point.

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Physics grapples with the largest questions the universe presents.
"Where did the totality of reality come from?"
"Did time have a beginning?"