You could put it like that. From 15 February UK residents returning to England having visited a country on “red list” in the previous 10 days will be required quarantine hotel for days, try prevent new chains of transmission. Many countries have already rolled out similar policies, including China, Australia, Hong Kong, India, New Zealand, Philippines, Qatar, Taiwan, Singapore, and Thailand, th...

The distribution νλ of the random series ∑ ±λ is the infinite convolution product of 1 2 (δ−λn + δλn). These measures have been studied since the 1930’s, revealing connections with harmonic analysis, the theory of algebraic numbers, dynamical systems, and Hausdorff dimension estimation. In this survey we describe some of these connections, and the progress that has been made so far on the funda...