There is the styles of displaying the summation symbol:
- Compressed format. Compressed to fit onto one line. Such as: ∑ Ten < Span class= "Texatom" id= "mathjax-span-2023" >n = Span class= "mn" id= "mathjax-span-2027" style= "font-size:70.7%; Font-family:mathjax_main; " >1 n 2
- Full format. In a larger, more readable format. Such as: ∑ < Span class= "Texatom" id= "mathjax-span-2039" >n = Span class= "mn" id= "mathjax-span-2043" style= "font-size:70.7%; Font-family:mathjax_main; " >1 < Span class= "Texatom" id= "mathjax-span-2044" >10 n 2
The "to" control the display style:
\sum_{n=1}^{10} n^{2}
\displaystyle\sum_{n=1}^{10} n^{2}
Refs:
- http://timmurphy.org/2009/08/15/math-summation-symbol-in-latex/
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Math summation symbol in LaTeX
