Correct upper and lower indices in differential geometry

#1

Hi friend,

When doing geometry or physics, one often encounters upper and lower indices that are offset using \hphantom to align them, for example:

\Gamma^{\mu}_{\hphantom{\mu}\beta\alpha}

How can one implement this in TeXmacs?

Best regards,
Yeoi

#2

You can use \hphantom in TeXmacs as well :slight_smile:
Perhaps someone else knows a different way.

#4

Dear Pireddag,

Thank you very much for your kind response. I was wondering if you might have an example of how to use \hphantom in TeXmacs. I tried reading the explanation file in TeXmacs Focus, but I’m afraid I didn’t quite understand it.

Thank you again for your time and help!

Warm regards,
Yeoi

#5

Pls. paste your (first message) LaTeX expression into TeXmacs using Edit->Paste from->LaTeX; then you will be able to examine the corresponding TeXmacs structure in source mode.

Tomorrow I will have time to guide you step by step if necessary.

#6

There should be something in the Jolly Writer about this particular use-case, if I remember correctly.

#7

@yeoi Phantoms are clearly explained in §7.5.4 of The Jolly Writer, as mentioned by @mgubi.

image

#8

Hi Giovanni,

Thank you for teaching me this generic method for getting the TeXmacs code from LaTeX code. Yes, I could see that the TeXmacs source for this is simply \hphantom with an arbitary placeholder.

Best regards,
Yeoi

#9

Thank you very much Professor Gubinelli. Yes, it is mentioned in The Jolly Write as cited below by @xuyiqi1. And it seems to me that both phantom and hphantom do almost the same thing.

#10

hphantom regulates only horizontal space, vphantom only vertical, phantom both.