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Which requirements has to accomplish a loss function?

Is differentiation the single requirement?

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  • $\begingroup$ the loss function is closely related to the task to be solved. It is a broad topic. It is very well explained in Bishop's book "neural networks for pattern recognition" $\endgroup$ – jpmuc Jun 12 '19 at 18:44
  • $\begingroup$ below, two properties are called stats.stackexchange.com/questions/154879/… $\endgroup$ – malocho Jun 13 '19 at 14:47