sum (summation)

  • General syntax for symbols with a kind of lower and upper limits:


  • In general, there are two ways how these lower and upper expressions can be placed: centered below and above the symbol or in a subscript / superscript manner. In the first case the symbol name is preceded by the word "big", in the second there is no prefix.
  • Syntax for summation symbol:

$$\bigsum_{i=k}^{n}$$   gives  



$$\sum_{i=k}^{n}$$   gives 


  • Use font size commands for a nicer picture:

$$\LARGE\bigsum_{\small{i=1}}^{\small{n}}$$   gives  



$$\large\sum_{\small{i=1}}^{\small{n}}$$   gives 


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