Math & Science ⇒ two different align environments - eqn numbering

[zzziop]

Hello,

I have two different align environments, where I would like the equation numbering to start over in the 2nd one. However, the equation number just picks right back up from the last number in the first environment. Any ideas?

Here is my code:

Code: Select all

\begin{align}
F = f_1+f_2+f_3+…+f_n
\intertext{can be written as}
\sum_1^n{f_i}
\end{align}

\begin{align}
(a+b)^3 &= (a+b)^2(a+b)\\
&=(a^2+2ab+b^2)(a+b)\\
&=(a^3+2a^2b+ab^2) + (a^2b+2ab^2+b^3)\\
&=a^3+3a^2b+3ab^2+b^3
\end{align}

Thanks in advance.

[localghost]

For the first equation system you can use the align* environment which leaves you with unnumbered equations.


Best regards
Thorsten¹

[zzziop]

I'm not sure that would solve my problem. If I used {align*} in the first environment, that would get rid of the equation numbering there; however, I do want the equations to be numbered in both sections, and I just want the 2nd section to start over and number from 1 again...

[localghost]

Obviously I understood you wrong. You only have to reset the equation counter right after the first equation system.

Code: Select all

\setcounter{equation}{0}

Note that referencing will not be possible anymore and hyperref (if used) may give warnings.

[zzziop]

Thanks, that works perfectly!