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Apr 13 '20 at 19:27 history edited Chris Cundy CC BY-SA 4.0
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Apr 13 '20 at 19:26 comment added Chris Cundy Yep that's a good point!
Apr 13 '20 at 19:20 comment added nbro In your definition of cross-entropy, the CE will always be negative, given that log of a number between 0 and 1 (excluded) is always negative, but, in practice, the implementation of cross-entropy may use the negative of your formulation, so that you can minimize it (i.e. you want to conceptually minimize a "loss") rather than maximizing (i.e. the CE is defined in terms of the likelihood, so you want to maximise the likelihood).
Apr 13 '20 at 16:59 history answered Chris Cundy CC BY-SA 4.0