Left/Right
Delimiter matching.
The lr function allows you to match two delimiters and scale them with the
content they contain. While this also happens automatically for delimiters
that match syntactically, lr allows you to match two arbitrary delimiters
and control their size exactly. Apart from the lr function, Typst provides
a few more functions that create delimiter pairings for absolute, ceiled,
and floored values as well as norms.
To prevent a delimiter from being matched by Typst, and thus auto-scaled,
escape it with a backslash. To instead disable auto-scaling completely, use
set math.lr(size: 1em).
Example
$ [a, b/2] $
$ lr(]sum_(x=1)^n], size: #50%) x $
$ abs((x + y) / 2) $
$ \{ (x / y) \} $
#set math.lr(size: 1em)
$ { (a / b), a, b in (0; 1/2] } $
Function
lrElementElementElement functions can be customized with set and show rules.
set and show rules.Scales delimiters.
While matched delimiters scale by default, this can be used to scale unmatched delimiters and to control the delimiter scaling more precisely.
sizeSettableSettableSettable parameters can be set using the set rule, changing the default value used thereafter.
set rule, changing the default value used thereafter.The size of the brackets, relative to the height of the wrapped content.
Default value: 100% + 0pt
bodyRequiredRequiredRequired parameters must be specified when calling the function.PositionalPositionalPositional parameters can be set by specifying them in order, omitting the parameter name.
The delimited content, including the delimiters.
midElementElementElement functions can be customized with set and show rules.
set and show rules.Scales delimiters vertically to the nearest surrounding lr() group.
$ { x mid(|) sum_(i=1)^n w_i|f_i (x)| < 1 } $
bodyRequiredRequiredRequired parameters must be specified when calling the function.PositionalPositionalPositional parameters can be set by specifying them in order, omitting the parameter name.
The content to be scaled.
abs
Takes the absolute value of an expression.
$ abs(x/2) $
size
The size of the brackets, relative to the height of the wrapped content.
bodyRequiredRequiredRequired parameters must be specified when calling the function.PositionalPositionalPositional parameters can be set by specifying them in order, omitting the parameter name.
The expression to take the absolute value of.
norm
Takes the norm of an expression.
$ norm(x/2) $
size
The size of the brackets, relative to the height of the wrapped content.
bodyRequiredRequiredRequired parameters must be specified when calling the function.PositionalPositionalPositional parameters can be set by specifying them in order, omitting the parameter name.
The expression to take the norm of.
floor
Floors an expression.
$ floor(x/2) $
size
The size of the brackets, relative to the height of the wrapped content.
bodyRequiredRequiredRequired parameters must be specified when calling the function.PositionalPositionalPositional parameters can be set by specifying them in order, omitting the parameter name.
The expression to floor.
ceil
Ceils an expression.
$ ceil(x/2) $
size
The size of the brackets, relative to the height of the wrapped content.
bodyRequiredRequiredRequired parameters must be specified when calling the function.PositionalPositionalPositional parameters can be set by specifying them in order, omitting the parameter name.
The expression to ceil.
round
Rounds an expression.
$ round(x/2) $
size
The size of the brackets, relative to the height of the wrapped content.
bodyRequiredRequiredRequired parameters must be specified when calling the function.PositionalPositionalPositional parameters can be set by specifying them in order, omitting the parameter name.
The expression to round.