tmp のバックアップ差分(No.4) |
%indent $$$ \vec H = \left(\! \ffd{1}{4 \pi} \!\right) \int\! \ffd{dq(\vec r - \vec r \,')}{|(\vec r - \vec r \,')|^3} $$$ $$$ \vec H = \ffd{1}{4 \pi} \int\! \ffd{\vec r - \vec r \,'}{|\vec r - \vec r \,'|^3} dq $$$ $$$ \vec H = \ffd{1}{4 \pi} \int\!\! \ffd{\vec r - \vec r \,'}{|\vec r - \vec r \,'|^3}\, dq $$$ $$$ a \times b = \sum_{i = 1}^a \sum_{j = 1}^b 1 = \sum_{j = 1}^b \sum_{i = 1}^a 1 = b \times a $$$ $$$ \sum_{i = 1}^a \sum_{j = 1}^b 1 $$$ |