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find_the_fun
Active member
- Feb 1, 2012
- 166
In the definition of an integral what does the astrix (*) mean above the \(\displaystyle x_i\)? I got confused in class today because the prof used an astrix but just to mean the equation we had been talking about.

Also, I sometimes see the top of the sigma being \(\displaystyle n-1\) instead of \(\displaystyle n\). I guess it doesn't really make a difference since \(\displaystyle n\) goes to infinity but why the difference?

Also, I sometimes see the top of the sigma being \(\displaystyle n-1\) instead of \(\displaystyle n\). I guess it doesn't really make a difference since \(\displaystyle n\) goes to infinity but why the difference?