sometimes when writing mathematical expression with partial derivatives, one needs to write a vertical bar afterwards and write the value at the which the partial derivatives are being computed as subscripts. See for example the bottom post here:
http://www.physicsforums.com/showthread.php?t=63809
However, the \mid symbol doesn't produce a tall bar that corresponds to the size of the partial derivatives term. Is there a way to have a taller bar?
PS: Some other posts here mention \middle| but this doesn't compile on my computer.
Thanks in advance….
Best Answer
Try
Or if you have
\usepackage{amsmath}
, you can use\rvert
instead of the|
. In fact, this is probably the better way to go.