How do I use \begin{equation}

Asked Jan 27 '15 at 22:36

Active Jan 27 '15 at 22:40

Viewed 177 times

I'm trying to enumerate my equations using this command:

\begin{equation}

w(H)\le (g^2-5g+10)/2

\end{equation}

I have this in the log:

! Missing $ inserted.
<inserted text>
$
l.1026 \end{equation}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.
! Display math should end with $$.
<to be read again>
\endgroup
l.1026 \end{equation}
The `$' that I just saw supposedly matches a previous `$$'.
So I shall assume that you typed `$$' both times.
[21]...

I've already tried to put this $$ or $$$$ and nothing happens.

I need help.

Thanks

edited Jan 27 '15 at 22:40

cgnieder

66,645

asked Jan 27 '15 at 22:36

user26832

1

Don't leave blank lines and… why the $$ at the end of the line? – Manuel Jan 27 '15 at 22:38
1

There should be no blank line inside an equation environment. – egreg Jan 27 '15 at 22:38
@Manuel thanks do you know how I can enumerate by sections, for example (3.2) instead of (2) in the chapter 3? – user26832 Jan 27 '15 at 22:40
@egreg thanks egreg, do you know how I can enumerate the equations by sections? thanks again. – user26832 Jan 27 '15 at 22:41
If you have \usepackage{amsmath} (and you should anyway), just add \numberwithin{equation}{section} just before \begin{document}. – egreg Jan 27 '15 at 22:43
Don't leave a blank line inside your equation. See Documents with typical LaTeX errors. – Werner Jan 27 '15 at 22:54
@Werner thank you for this tutorial, I'm reading it right now. – user26832 Jan 27 '15 at 23:02

How do I use \begin{equation}

0 Answers0