Soft Spots in Dirac's Papers
and Feynman's Papers

Both Dirac and Feynman made their life-long efforts to make quantum mechanics consistent with special relativity. Click here for a story. However, they left some soft spots in their papers. Indeed, those soft spots are excellent homework problems for us.

On the issue of the Poincaré group

On the issue of the time-separation variable

Who is this young man?
copyright@2011,2015 by Y. S. Kim, unless otherwise specified.

  1. Click here for his home page.

  2. His Einstein page.
  3. Princeton page.

  4. His style page.