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We discuss the problem of the time variable in the nearly standard formulation of the quantum mechanics. In order to be able to describe the outcome of some of the experiments, we have used a novel formulation of the time evolution of quantum states called the projection evolution. As an example a delayed-choice experiment is described. We show that this description recreates the experimental results...
We propose a general algorithm which aims at optimizing the usage of computer resources fortabulating families of functions possessing known symmetries. The approach is based on the grouptheoretical description of symmetry relations among the functions and their parameters, whereorbits play a crucial role.
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