Jakulin, Aleks Symmetry and information theory. (English) Zbl 1094.94014 Symmetry Cult. Sci. 16, No. 1, 7-26 (2005). Summary: Before information theory can be applied, we must postulate a particular model of the universe based on probability theory. We journey through the assumptions, advantages and disadvantages of the view, where the universe is an alphabet, an event, a letter, and prediction a game. There are three kinds of symmetry or similarity in such a universe: symmetries between probabilities reveal ignorance, symmetries between events reveal indifference, and symmetries between properties reveal information. MSC: 94A15 Information theory (general) 60-XX Probability theory and stochastic processes Keywords:symmetry PDFBibTeX XMLCite \textit{A. Jakulin}, Symmetry Cult. Sci. 16, No. 1, 7--26 (2005; Zbl 1094.94014)