Degree of freedom | Variables, Parameters, Estimation
https://www.britannica.com/science/degree-of-freedom-mathematics-and-statistics
WEBdegree of freedom, in mathematics, any of the number of independent quantities necessary to express the values of all the variable properties of a system. A system composed of a point moving without constraints in space, for example, has three degrees of freedom because three coordinates are needed to determine the position of the point.
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