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DoubleVerticalBar 
DoubleVerticalBar[x, y, ...]
displays as 
.
Details
- DoubleVerticalBar[x, y, ...] has no built-in meaning.
is by default interpreted as DoubleVerticalBar[x, y].
can be entered as \[DoubleVerticalBar] or Esc
||Esc.- Esc||Esc is the alias for \[Or]. The alias for \[DoubleVerticalBar] has a space at the beginning.
New in 6
