- 追加された行はこの色です。
- 削除された行はこの色です。
%indent
$$$
\vec H = \left(\! \ffd{1}{4 \pi} \!\right)
\int\! \ffd{dq(\vec r - \vec r \,')}{|(\vec r - \vec r \,')|^3}
$$$
$$$
\vec H = \ffd{1}{4 \pi}
\int\! \ffd{\vec r - \vec r \,'}{|\vec r - \vec r \,'|^3} dq
$$$
$$$
\vec H = \ffd{1}{4 \pi}
\int\!\! \ffd{\vec r - \vec r \,'}{|\vec r - \vec r \,'|^3}\, dq
$$$
$$$
a \times b = \sum_{i = 1}^a \sum_{j = 1}^b 1 = \sum_{j = 1}^b \sum_{i = 1}^a 1 = b \times a
$$$
$$$
\sum_{i = 1}^a \sum_{j = 1}^b 1
$$$
$$$
\begin{array}{l}
x^2 + 25x - 144
\\ =\left(x-\ffd{25-\sqrt{1201}}2\right)\left(x-\ffd{25+\sqrt{1201}}2\right)
\end{array}
$$$
![[PukiWiki]](image/NekoPunch.png "[PukiWiki]")
