Hi;

Please see attached notebook detailing confusion taking the partial derivative of y' with respect to y. In my way of thinking (which may be wrong) y' and y are totally different and therefore y' should be considered a constant when taking the partial derivative with respect to y.

Granted this could be a case of simply me not understanding how to properly use Mathematica, but though I would run it past you experts for your advice.

Thanks,

Mitch Sandlin