I want insert this math equation into my paper:

Math rockz!

However, the part in the brackets make me confused. I google math equation in LaTeX but find no relavent information. This is what I alreadly have now:

$MR(e) = \Pi_{(R_{i}.ID, R_{j}.ID)}()$

Could you please help me to fill in the brackets.


First, never use $\Pi$ when you obviously mean $\prod$. Second, I guess dots here between $R_i$ and $ID$ should be centered.

Here is what I got:

  MR(e) = \prod_{(R_i\cdot ID, R_j\cdot ID)}
  \underset{\Dist_{sp}(r_i,r_j)\le\delta}{(R_i\bowtie R_j)} 

enter image description here

  • I am appreciate for your help. One more question, do you know how to add this into a algorithm after \state(I use algorithms package). I know how to insert use $ $ method, but don't know how to use \begin{dispalymath} \end{dispalymath} Jan 17 '12 at 16:54
  • Use this: $MR(e) = \prod_{(R_i\cdot ID, R_j\cdot ID)} \underset{\Dist_{sp}(r_i,r_j)\le\delta}{(R_i\bowtie R_j)}$. Note that the expression under \prod symbol becomes inline rather than under it: this is because you move from display math to inline math.
    – Boris
    Jan 17 '12 at 16:57

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