How can I make a subscript for sum in latex like the following picture:

I tried `\sum_{q_i}`

but that doesn't make the result I want. It makes the following result:

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# [Tex/LaTex] Subscript of sum

math-modemath-operatorssubscripts

How can I make a subscript for sum in latex like the following picture:

I tried `\sum_{q_i}`

but that doesn't make the result I want. It makes the following result:

## Best Answer

That is expected; it's a matter of

inline math modeversusdisplay math mode.Inline math is meant for small fragments inside the running text, so it is typeset in a compact way, with the subscript to the side of the sum symbol. Inline math is done with

`$...$`

.Display math is meant for larger, standalone equations, and is set in a paragraph of its own. Because it has more space, the subscript can be put underneath the sum symbol. Display math is done with

`\[...\]`

or a whole variety of environments.