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# February 27

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February 27 is the 58th day of the year in the Gregorian Calendar. There are 307 days remaining, 308 in leap years.

 Quantum entanglement ... the quantity $S = - k \hbox{Tr} \left( \rho \ln{\rho} \right)$ where k is Boltzmann's constant, and the trace is taken over the space H in ...