Thanks! I was tracing my chart to see why I have the sign reverse as you said.

The chart is originated from the min-max equation I use in another article, so one path is to minimize the objective function and one is to maximize the objective function. i.e. why I don’t have the negative sign. But now, I realize that it is not clear in other contexts.

I will make it more clear when I have time. I can just put the negative sign back. But I need to see the description is correct also in other places.

Thanks again for pointing this out. I do think you get this right. I appreciate your time in clarifying it.

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