# spacing between list and equation

my code is

\item Discuss to what extent the cable length affects the peak voltage at node C.
\end{enumerate}

\begin{center}
\begin{align*}
H(t) = 0 \ for\ t < 0 \\
H(t) = 1 \ for\ t \geq 0
\end{align*}
\end{center}


How can i minimize the space between the list and equation?Thanks in advance

• Welcome to TeX.SX! Why the center environment? Displayed equations are centered by default. – Torbjørn T. Jun 25 '15 at 17:04
• You should never have a blank line before a displayed equation, and certainly never put it in center each of those would create spurious space, and you have both. – David Carlisle Jun 25 '15 at 17:06

## 1 Answer

This should be

\item Discuss to what extent the cable length affects the peak voltage at node C.
\begin{align*}
H(t) = 0 &\text{ for } t < 0 \\
H(t) = 1 & \text{for } t \geq 0
\end{align*}
\end{enumerate}


Don't have a blank line before a displayed equation or put it in a display environment such as center also don't have align with no alignment points (& and don't have words like for in math italic. Probably it would be better to use cases rather than align*/

• Thanks, i am just a beginner. It works.Can i also ask you another question. I have been translating document in Microsoft word to latex and i have some figures that is blurred (i.e. i have use snipping tool or just copied from the file. Can you give me some suggestion for this problem or suggest me some drawing platform for latex which is easy and more efficient. – user72930 Jun 25 '15 at 17:23