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Trouble writing the backpropagation algorithm in python through crossentropy and softmax

I found the bug on my code, now everything works just fine, so I am fairly sure that the derivation of the formulas is on point. Optimisation wise, clearly using the short formula on the end of the ...
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How does backpropagation know which weights to change?

@serali is correct, there are many resources to describe this process. I'm going to talk about it in a very general way. Disclaimer: this is a work in progress, it is not yet complete. Question: How ...
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