thumbs.pro : princewifi: The gradient of the function f(x,y) = −(cos2x + cos2y)2 depicted as a projected vector field on the bottom plane

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princewifi: The gradient of the function f(x,y) = −(cos2x + cos2y)2 depicted as a projected vector field on the bottom plane

published on: 2014-04-22 06:28:31

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