In quantum mechanics, given an algebra of quantum observables, a classical context is a commutative subalgebra.
The quantum observables in such a commutative subalgebra may all be measured simultaneously without the uncertainty principle of quantum mechanics interfering, hence they may be measured as observables in classical mechanics.
Last revised on January 7, 2014 at 12:21:25. See the history of this page for a list of all contributions to it.