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|Noun||1.||theoretical account - a hypothetical description of a complex entity or process; "the computer program was based on a model of the circulatory and respiratory systems"|
computer simulation, simulation - (computer science) the technique of representing the real world by a computer program; "a simulation should imitate the internal processes and not merely the results of the thing being simulated"
hypothesis, theory, possibility - a tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena; "a scientific hypothesis that survives experimental testing becomes a scientific theory"; "he proposed a fresh theory of alkalis that later was accepted in chemical practices"
mean sun - a theoretical sun that moves along the celestial equator at a constant speed and completes its annual course in the same amount of time the real sun takes at variable speeds
Copernican system - (astronomy) Copernicus' astronomical model in which the Earth rotates around the sun
Ptolemaic system - (astronomy) Ptolemy's model of the universe with the Earth at the center
M-theory - (particle physics) a theory that involves an eleven-dimensional universe in which the weak and strong forces and gravity are unified and to which all the string theories belong
string theory - (particle physics) a theory that postulates that subatomic particles are one-dimensional strings
stochastic process - a statistical process involving a number of random variables depending on a variable parameter (which is usually time)