Space-Time Diffeomorphisms in Noncommutative Gauge Theories von Rosenbaum, M., Vergara, J.D., Juarez, L.R.

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An Alternative Canonical Approach to the Ghost Problem in a Complexified Extension of the Pais-Uhlenbeck Oscillator von Déctor, A., Morales-Técotl, H.A., Urrutia, L.F., Vergara, J.D.

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