Delimiters\|

\|Symbol

The ‖ symbol (Double vertical line, U+2016), written as \| in LaTeX math mode.

\|

Topic: Delimiters
Available in: base
Allowed mode: math
Frequency: 4.60% of corpus formulasrank 22 of 474
Glyph: ‖
Unicode: U+2016 · DOUBLE VERTICAL LINE
Delimiter: delimiter

Common tasks#

How to write a double vertical bar / norm#

The symbol page for | is the control sequence \| (‖), not the bare | character.

\|x\|

How to write a stretchy norm#

\left\| \frac{a}{b} \right\|

How to write an operator norm#

\|A\|_{\mathrm{op}}

In TeXForm#

TeXForm parses this entry as a character leaf mapped to U+2016 (DOUBLE VERTICAL LINE).

See also#

\| command

In Delimiters68

All 68 in Delimiters