# Definition:Parenthesis/Also denoted as

## Parenthesis: Also denoted as

There is no universal convention as to exactly what shaped brackets are used for **parentheses**, but (usually) round brackets $\paren \;$ are used.

A notable counterexample is the elegantly-presented 1996: H. Jerome Keisler and Joel Robbin: *Mathematical Logic and Computability*, which uses square ones: $\sqbrk \;$.

Some authors, when writing complicated statements with nested **parentheses**, use differently shaped brackets, either square brackets $\sqbrk \;$ or braces $\set \;$ for each different **parentheses**, in an attempt to make it clearer which brackets go with which substatements.

However, some have the opinion that this does not actually aid comprehension and can add unnecessary confusion -- especially when particular bracket styles are being used for particular mathematical tasks, as they frequently are.

It also happens, unfortunately, that square brackets do not render well in all browsers when they have been automatically scaled by our rendering software.

Therefore it is recommended that on $\mathsf{Pr} \infty \mathsf{fWiki}$ **round brackets** are used throughout for '**parenthesis**.