these quantities
91Variable star — A star is classified as variable if its apparent brightness as seen from Earth changes over time, whether the changes are due to variations in the star s actual luminosity, or to variations in the amount of the star s light that is blocked from… …
92Polar coordinate system — Points in the polar coordinate system with pole O and polar axis L. In green, the point with radial coordinate 3 and angular coordinate 60 …
93Predictive analytics — encompasses a variety of techniques from statistics and data mining that analyze current and historical data to make predictions about future events. Such predictions rarely take the form of absolute statements, and are more likely to be… …
94Matrix (mathematics) — Specific elements of a matrix are often denoted by a variable with two subscripts. For instance, a2,1 represents the element at the second row and first column of a matrix A. In mathematics, a matrix (plural matrices, or less commonly matrixes)… …
95Albert Einstein — Einstein redirects here. For other uses, see Einstein (disambiguation) …
96Weather forecasting — weather forecaster redirects here. For other uses, see Weatherman (disambiguation). Forecast of surface pressures five days into the future for the north Pacific, North America, and north Atlantic ocean. Weather forecasting is the application of… …
97Intertemporal equilibrium — is a notion of economic equilibrium conceived over many periods of time. The term has a different meaning in contemporary macroeconomics from its earlier meaning in Austrian economics. Meaning in contemporary macroeconomicsIn New Classical or New …
98Alexander Frumkin — Alexander Naumovich Frumkin (Александр Наумович Фрумкин) (October 24, 1895 ndash; May 27, 1976), Russian/Soviet electrochemist, member of the Russian Academy of Sciences since 1932, founder of the Russian Journal of Electrochemistry… …
99Antimatter weapon — An antimatter weapon is a hypothetical device using antimatter as a power source, a propellant, or an explosive for a weapon. Antimatter weapons do not currently exist outside fiction (such as Star Trek s photon torpedo). The United States Air… …
100Supersymmetric quantum mechanics — In theoretical physics, supersymmetric quantum mechanics is an area of research where mathematical concepts from high energy physics are applied to the seemingly more prosaic field of quantum mechanics. IntroductionUnderstanding the consequences… …
