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Here are some (very old) articles/papers that may be of interest. For my more recent work, please see my PhD thesis or my university homepage.
An Essay: Instantaneous Measurement of Nonlocal Variables
We ask the question: is it possible to measure nonlocal properties of a state instantaneously? Relativistic causality restricts how this can be done, but we show here, for the bipartite two dimensional case, that every nonlocal variable of the system can be measured instantaneously. A necessary condition for a general nonlocal measurement on a bipartite system is presented.

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The Runge-Lenz Vector
I have written a short article which defines the Runge-Lenz vector, shows it is conserved in a 1/r potential and uses this to show the general orbit is a conic section.
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