I'm currently trying to write over/under an implies arrow in LaTeX (in math mode):
\implies_{text}
This places the text lower, but next to the arrow, not below it. How can I get it below the arrow?
1 Answer
You can use \xRightarrow[below]{above} from the mathtools (or extpfeil) package or \xLongrightarrow[below]{above} from extarrows. (Have a look at “How to look up a math symbol?” for ideas how you can easily find a particular symbol.)
If you want to keep the the same arrow length as implies, you can use \underset and \overset from amsmath, e.g. \underset{below}{\implies}, or maybe \underset{\mathclap{below}}{\implies} (\mathclap makes it so that “below” doesn’t introduce extra vertical space if it is longer than the arrow. It is included in the immensely useful mathtools package).
answered Nov 9, 2010 at 19:25
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Sadly, the proposed arrow looks different than the implies arrow, so it wouldn't fit with the rest of the equations :/ thanks for your help though.– FemarefCommented Nov 9, 2010 at 19:35
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1@femaref Except for the length they look exactly the same on my system. Do you want the length to stay constant?– CaramdirCommented Nov 9, 2010 at 19:39
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1the second thing helped me. For you, comparision of the two arrows: abload.de/img/arrows_zoomednbxj.png and abload.de/img/arrowsrbfs.png– FemarefCommented Nov 9, 2010 at 19:49
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\undersetFTW. And I need to learn more aboutmathtools. Commented Nov 9, 2010 at 19:56 -
1@Femaref: You are using 12pt, aren't you? You might want to have a look at this question if you want the arrows look better. Commented Nov 9, 2010 at 21:33
amsmaththen I strongly expect that the answer to your question will be very similar to the accepted answer to that question.