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cubic curve

   Also found in: Wikipedia 0.01 sec.
cubic curve [′kyü·bik ′kərv]
(mathematics)
A plane curve which has an equation of the formf(x, y) = 0, wheref(x,y) is a polynomial of degree three inxandy.


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The cubic curve looks a little more interesting, but the improvement in fit is statistically negligible (R-squared = 0.
Then, in Astronomy, the cubic curve that we are seeking must have negative values for times smaller that -290 (times before Aristarchus) and after Aristarchus but before Copernicus (Dark Ages of Astronomy), while after Copernicus, the cubic must be positive.
 
 
 
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