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Topic: defining an unknown function
Replies: 1   Last Post: Jan 14, 2013 11:28 PM

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Posts: 15
Registered: 10/12/05
defining an unknown function
Posted: Jan 11, 2013 10:23 PM
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Hi all,
I would like to start by defining H = {{\partial_{x,x} L,\partial_{x,y} L},
{\partial_{y,x} L, \partial_{y,y} L}};
where at this stage, the only think i know is that L is of the form L(x,y). This is a Hessian, and I would like to symbolically compute the e-vals and e-vecs. I wanted to know how I should tell mathematica to consider L as L(x,y) ?


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