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| Enlightened | First to answer and accepted with score of 10 or more. This badge can be awarded multiple times. |
Urs Schreiber earned this badge 3 times |
jan 11 at 17:54
Is ghost-number a physical reality/observable?
may 4 '12 at 21:11
Sympletic structure of General Relativity
may 4 '12 at 21:11
Physical interpretation of different selfadjoint extensions
