There are many questions here about increasing the height of the square root (e.g. How to adjust/increase the height of square root?), but I'd like to decrease it. Consider the following code and picture:

\sqrt{\tfrac{2 \log \left(2 n T^{2}\right)}{s}}

enter image description here

I think the exponent on the T is causing issues, so maybe lowering the exponent may help? Thanks for any help.

  • 2
    Don't use \left(...\right). Instead, just use (...).
    – Werner
    Jan 26, 2021 at 6:21
  • @Werner that helps a little bit, but perhaps there is a more fine-grained control that LaTeX provides over the height of the square root?
    – D.R
    Jan 26, 2021 at 6:29
  • 2
    I see nothing particularly strange when \left and \right are omitted.
    – egreg
    Jan 26, 2021 at 6:52
  • You can use \smash to ignore the extra height from the 2. E.g. \smash{2nT^2} will get rid of the tiny difference in the height of the bars after removing \left and \right.
    – Fintan
    Jan 26, 2021 at 9:43

2 Answers 2


I present five possibilities. The top one is your, where \left and \right are the cause for the big space.



&\text{with \texttt{\string\left...\string\right}}&\quad&
\sqrt{\tfrac{2 \log \left(2 n T^{2}\right)}{s}}
&\text{without \texttt{\string\left...\string\right}}&&
\sqrt{\tfrac{2 \log (2 n T^{2})}{s}}
&\text{with \texttt{\string\cramped}}&&
\sqrt{\tfrac{\cramped{2 \log (2 n T^{2})}}{s}}
&\text{smashing the numerator}&&
\sqrt{\tfrac{2\smash[t]{{}\log (2 n T^{2})}}{s}}
&\text{smashing and cramping the numerator}&&
\sqrt{\tfrac{2\smash[t]{{}\log (2 n \cramped{T^{2}})}}{s}}


enter image description here

I'd go with the simplest one, that is, (2).


The culprit is actually the pair of parentheses under the square root. Does the following code do what you want?

\sqrt{\tfrac{2 \log \smash[t]{\left( 2 n T^{2} \right)}\vphantom{T^2}}{s}}

enter image description here

Edit: as suggested by Mico, you can also use this code:

\sqrt{\tfrac{2\log\left(\smash[t]{2 n T^{2}}\right)}{s}}

enter image description here

However, the parentheses are a bit too small for my taste.

  • +1. You might also show the output produced by \left(\smash[t]{ 2 n T^{2}} \right).
    – Mico
    Jan 26, 2021 at 11:34
  • @Mico: You're right. I'll add it in a moment.
    – Bernard
    Jan 26, 2021 at 11:37

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