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I want to confirm if I interpreted following optimization function correctly?

Let's say we have a set of nodes (say users connected to a Base Station in cellular network), denoted as, $$U={u_1,u_2,...,u_M}$$ and let $$Throughput(u_m), \forall u_m \in U$$ be a function (say throughput calculating function) defined on each element in $U$.

I define an optimization problem as, "find a user in $U$ such that it has the minimum throughput."

For above optimization problem, I define following function,$$i\gets \underset{m\ :\ u_m\in \ U}{argmin} \ Throughput(u_m)$$

I want to confirm if I have interpreted the function correctly?

Thanks!

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1 Answer 1

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The sentence you give and the notation (defining a variable $i$) give the same meaning; they both give you a user. However, an optimization problem should be defined in terms of numbers... not "users". So for an optimization problem, you would want to probably optimize $Throughput(i)$, that is $$\min_{u_m \in U} Throughput(u_m)$$

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  • $\begingroup$ Dear Alex, Thanks for your comment. I want to find a user achieving minimum throughput. That's why I use argmin function. I guess the problem statement was not defined correctly. Therefore, I update it. $\endgroup$ Feb 7, 2017 at 5:05
  • $\begingroup$ If you are optimizing to find the user, then yes, your form is correct. Don't forget to mark the answer as accepted if you're done :) $\endgroup$ Feb 7, 2017 at 5:09

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