In contrast to classical theory, quantum theory has the remarkable property that the state space of every system has continuously many pure states. These are states that can be seen as states of ...

Since Donald Trump has picked Betsy DeVos to be education secretary, many commentators have been pulling out their anti-school choice arguments from the closet, and for the most part it isn’t a pretty ...

In the double slit experiment, quantum objects such as photons or electrons are beamed through two closely spaced slits. Since we don't know which slit each object passes through, the possibilities ...

Einstein and Rosen 1 have admitted that the geodesic postulate is an extraneous one and that the field-equations of gravitation must give both matter and motion independently of such a postulate. It ...

Scientists studying radiation from a distant gamma-ray burst have found that the speed of light does not vary with wavelength down to distance scales below that of the Planck length. They say that ...

An article that claims that researchers have not proven that SARS-CoV-2 causes COVID-19 uses outdated criteria and presents incomplete facts to make its arguments. The article focuses on how ...

This is a preview. Log in through your library . Abstract In this paper we give a stronger form of Bertrand's postulate and use it to prove that every positive integer, except 1, 2, 4, 6, and 9, can ...