It is very easy to put a tilde *over* the symbol in math mode. Simply type `$\tilde{a}$`

. But how to put a tilde *under* the symbol in math mode?

# [Tex/LaTex] How to put a tilde under the symbol in math mode

accentsmath-mode

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# [Tex/LaTex] How to put a tilde under the symbol in math mode

accentsmath-mode

*over* the symbol in math mode. Simply type `$\tilde{a}$`

. But how to put a tilde *under* the symbol in math mode?

## Best Answer

The

`undertilde`

package providesextensibletilde accents under elements in math mode via`\utilde{<symbols>}`

. Try, for example:Alternatively, as @egreg suggests, the

`accents`

package provides`\underaccent[<accent>]{<symbol>}`

. Try, for example:See page 2 of the package documentation in order to extend this using

`\widetilde`

rather than`\tilde`

. It depends on your preference.