Moyal bracket

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In physics, the Moyal bracket is the suitably normalized antisymmetrization of the phase-space star product.

The Moyal bracket was developed in about 1940 by José Enrique Moyal, but Moyal only succeeded in publishing his work in 1949 after a lengthy dispute with Paul Dirac.^[1][2] In the meantime this idea was independently introduced in 1946 by Hip Groenewold.^[3]