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I would like to write the following equation:

enter image description here

How do I produce the vertical line and the subscript 'iso-effect'?

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up vote 10 down vote accepted





enter image description here

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The - in “iso-effect” is probably not a minus sign, but an ordinary hyphen, thus \textrm is the better choice (the same applies for “photon” and “test” as well). I would also move \left. to the left of \frac (it doesn’t change the output but is probably semantically correct). – Qrrbrbirlbel Jan 12 '13 at 13:56
Changed. Thanks. – hpesoj626 Jan 12 '13 at 13:59
looks to me like the "RBE" should also be \textrm. – barbara beeton Jan 12 '13 at 17:29
@barbarabeeton Looking at the provided figure, I think you are right. Edited. – hpesoj626 Jan 12 '13 at 17:34
Yes, RBE is not a variable. – Eekhoorn Jan 13 '13 at 10:37

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