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math-ph2000
Matrix representation of the generalized Moyal algebra
Jerzy F. Plebanski, Maciej Przanowski, Francisco J. Turrubiates
It is shown that the isomorphism between the generalized Moyal algebra and the matrix algebra follows in a natural manner from the generalized Weyl quantization rule and from the w…
gr-qc2000
Non-vacuum twisting type N metrics
Paweł~Nurowski, Jerzy F. Plebański
A maximally reduced system of equations corresponding to the twisting type N Einstein metrics is given. When the cosmological constant they reduce to the standard equation…