# How to write a tilde over a sigma? [duplicate]

Good evening to everybody here.. My problem is how to write a "tilde" over a symbol (sigma for the precision) in the text mode.. Thank you so much

## marked as duplicate by Werner, Svend Tveskæg, user13907, Masroor, RubenDec 18 '14 at 0:50

• Possible duplicate: How to type \sim above another symbol x? Use $\tilde{\sigma}$. – Werner Nov 17 '14 at 22:34
• Welcome to TeX.SX! How do you type the sigma, to begin with? Is the “tilde” the Greek circumflex accent? – egreg Nov 17 '14 at 22:34
• @Werner Note text mode – egreg Nov 17 '14 at 22:36
• @Sigur I guess that Greeks often use their sigmas in text mode. – egreg Nov 17 '14 at 22:53
• However, the circumflex accent doesn't go over a sigma. – egreg Nov 17 '14 at 23:10

If by "text mode" you mean you don't want the sigma to look like it's typeset in math mode you can try using the upgreek package. Compare below.
\documentclass[border=1mm]{standalone}
$\tilde{\sigma}\tilde{\upsigma}$