Suppose Alice has an equation labelled by (3). After several pages, she wants to label a new equation by (3)', to indicate that the new equation (3)' is an analog of (3). How does she type in Latex to get the label (3)'?

  • "Go ask Alice...when she's ten feet tall." (sorry, I couldn't resist the classic song lyric). – Steven B. Segletes Jun 30 '14 at 11:37
  • 2
    @StevenB.Segletes - We seriously risk betraying our age by providing such references. :-) I recently managed to lose my audience with a reference to "One Word: Plastics"... – Mico Jun 30 '14 at 12:13
  • 1
    @Mico And here I discover a little more about “Plastics”. But remember that it's not only the age, also the country we are from influences in our understanding ;) – Manuel Jun 30 '14 at 12:26
  • @StevenB.Segletes - I cannot believe that this is the first time that I notice the existence of the lyric... Thanks for the happy accidence! – kwgl Jun 30 '14 at 12:37
  • 1
    @Manuel - I'm afraid the query to which you had posted one one-word comment and I had posted "Plastics" got deleted before I had a chance to provide some follow-up. Anyway, do a search for "graduate plastics" on youtube and enjoy the scene from the movie "The Graduate", Dustin Hoffman's break-out performance that made him a huge star. :-) – Mico Jun 30 '14 at 12:47

I just came up with a solution to my own problem. Suppose Alice uses \label{eq3} to label (3). She can label a new equation as (3)' in the following way:

  • 1
    If you use the amsmath package then you can reference equations with \eqref{}, which puts parentheses around the equation number automatically. – Ubiquitous Jun 30 '14 at 15:02
  • Yes. Thank you for leading me to the command! To use (\ref{...}) was one of my primordial habits. Now \eqref is ubiquitous. :) – kwgl Jun 30 '14 at 20:52

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.