C1 W3 optional lab: logistic loss

hi I’m confused about the graph
the buttom of the graph is not smooth as shown in the image, doesn’t this mean that there is local minimum?

You can try rotating the image if possible or it maybe that due to a 3D view that wouldn’t be apparent directly.

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No, that’s an artifact of how the 3D curve is rendered in 2D.

I see. Thank you for your help.

I see, thank you for the help