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== Reference == | == Reference == | ||
* [https://cds.cern.ch/record/181783/files/cer-000093203.pdf Physics & Geometry by Ed Witten] | * [https://cds.cern.ch/record/181783/files/cer-000093203.pdf Physics & Geometry by Ed Witten] | ||
* [http://www.math.stonybrook.edu/~tony/scgp/wall-story/wall-story.html The wall at the Simons Center for Geometry and Physics | * [http://www.math.stonybrook.edu/~tony/scgp/wall-story/wall-story.html The wall at the Simons Center for Geometry and Physics, Stony Brook University] | ||
Stony Brook University] | |||
* [https://www.amazon.com/Road-Reality-Complete-Guide-Universe/dp/0679776311 The Road to Reality by Sir Roger Penrose] | * [https://www.amazon.com/Road-Reality-Complete-Guide-Universe/dp/0679776311 The Road to Reality by Sir Roger Penrose] | ||