What command gives me the highlighted operator?

Question

I need to write this equation in latex, but I don't know how to get the vertical line and the B subscript below it. If anyone knows the operator or command, it'd be very helpful.

score 3 · Accepted Answer · answered Jul 22 '19 at 08:01

3

With a structure \left-\right:

$\bar M_d = \left.\frac{d \bar H_B}{d t}\right|_B$

answered Jul 22 '19 at 08:01

F. Pantigny

40,250

\left\vert...\right\vert also produced the same result, but better spacing... – MadyYuvi Jul 22 '19 at 08:45
@MadyYuvi -- The code you show will produce two verticals; not what was requested. – barbara beeton Jul 22 '19 at 17:44
@barbarabeeton The code $\left\vert \frac{a}{b}\right\vert$ will produce single vertical rule only, \Vert only produce two vertical lines... – MadyYuvi Jul 23 '19 at 05:07
@MadyYuvi -- That's not what I meant. Only one vertical rule is requested, on only the right side. That would be encoded, using your formulation, as \left. ... \right\vert. – barbara beeton Jul 23 '19 at 13:32
@barbarabeeton oops...I misunderstood.... – MadyYuvi Jul 23 '19 at 13:32

What command gives me the highlighted operator?

1 Answers1