description:[g,varnew] = NC2d(f) computes the second derivative of the polynomial f: where h = (h _{1}, h_{2}, ... , h_{n}) and the polynomial f does not contain any of the variables h_{1}, h_{2}, ...arguments:NCpoly representing the polynomial f output:g is an NCpoly representing the second derivative of the polynomial f varnew is a cell containing all NCvars and h possible usage:NC2d(f) example:>> [g,var]=NC2d(x^2+x*y-z^3) g = 2*h1^2+2*h1*h2-2*h3^2*z-2*h3*z*h3-2*z*h3^2 var = 'x' 'h1' 'y' 'h2' 'z' 'h3' |

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