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    • The Mystery of Spin | Not Even Wrong

      Columbia University News· 1 hour ago

      The spinor representation is on $S=mathbf C^2$, but one wants the vector representation to be on $V_{mathbf R}=mathbf R^3$, not on its complexification $V=mathbf C^3$, which is what one gets ...

    • When you never have to say 'sorry'

      When you never have to say 'sorry'

      DJournalnow· 2 days ago

      The best jobs in Washington are the ones in which you never have to admit error and apologize. These jobs are mostly in government and the major media....