0

I'm trying to get two equations aligned via the equals sign, this is my code so far:

\begin{align}
\int_0^1 xJ_v(\lambda x)J_v(\mu x) \mathrm{d}x &= \frac{\mu J_v(\lambda)J^{\prime}_v(\mu) - \lambda J_v (\mu)J^{\prime}_v(\lambda)}{\lambda^2 - \mu^2}
\\[5mm]
\int_0^1 x[J_v(\lambda x)]^2 \mathrm{d}x &= [J_{v+1}(\lambda)]^2 + \left( \frac{\lambda^2 - v^2}{2 \lambda^2} \right)[J_v(\lambda)]^2,
\end{align}

I've tried using & and also \begin{align} but it doesn't seem to work. Any help?

migrated from math.stackexchange.com Dec 2 '14 at 1:59

This question came from our site for people studying math at any level and professionals in related fields.

  • If you used align and the equations aren't aligning, you have improperly placed the alignment character & or haven't placed it at all. – dustin Dec 2 '14 at 1:58
  • @dustin -- your edit made the code work. the problem was that the end of the first line was marked with \[5mm] where a double backslash was needed. you edited in the second backslash when you reformatted the code. – barbara beeton Dec 2 '14 at 14:13
  • @barbarabeeton his post on math.stackexchange was off with that code. I didnt check the mathjx formatting. I just assumed a missing or misplaced & when I commented. – dustin Dec 2 '14 at 14:53
1

Right click on the displayed expression below, select Show Math As, and then select TeX Commands.

\begin{align*}
\int_0^1 xJ_v(\lambda x)J_v(\mu x) \mathrm{d}x &= \frac{\mu J_v(\lambda)J^{\prime}_v(\mu) - \lambda J_v (\mu)J^{\prime}_v(\lambda)}{\lambda^2 - \mu^2}\;,\\\\
\int_0^1 x[J_v(\lambda x)]^2 \mathrm{d}x &= [J_{v+1}(\lambda)]^2 + \left( \frac{\lambda^2 - v^2}{2 \lambda^2} \right)[J_v(\lambda)]^2\;,
\end{align*}
1

In general to align equations, it goes like:

Document text here.
\begin{align}
  \label{eq1} x^2 & = y^2 \\
  \label{eq2} x^2 & = y^2 \\
  \label{eq3} x^2 & = y^2
\end{align}

If you want the equations to not be numbered, take out the label commands and don't write the * at the end of align. Note that you don't need to use other commands to enter and exit the math environment, such as $$ or the commands

\begin{equation}

\end{equation}

  • Taking out \label doesn't stop numbering in LaTeX. Maybe on MathJax but this is not the case in general. To stop numbering, one would use \begin{align*} variant. – dustin Dec 2 '14 at 1:54
  • Or use the command \notag – 1010011010 Jun 10 '15 at 13:16

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.