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```Hi,

I am a newbie in NN and is self learning at the moment, i needed some
background on the second order partial derivative of the energy
function to obtain the weights for a Hopfield TSP network.  I like to
find out what is the detail working (math!) of the second order
partial derivative of the energy function and how does one arrive to
the weight that contained the kronecker delta terms.   Do anyone have
any information regarding this details??

Thank You!

Casey
```
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