{"id":3934,"date":"2022-09-22T15:42:40","date_gmt":"2022-09-22T06:42:40","guid":{"rendered":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/?p=3934"},"modified":"2023-03-28T09:58:26","modified_gmt":"2023-03-28T00:58:26","slug":"maxima-%e3%81%a7%e3%83%99%e3%82%af%e3%83%88%e3%83%ab%e5%a0%b4%ef%bc%88%e9%9b%bb%e5%a0%b4%e3%83%bb%e7%a3%81%e5%a0%b4%ef%bc%89%e3%82%92%e6%8f%8f%e3%81%8f","status":"publish","type":"post","link":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/3934\/","title":{"rendered":"Maxima \u3067\u30d9\u30af\u30c8\u30eb\u5834\uff08\u96fb\u5834\u30fb\u78c1\u5834\uff09\u3092\u63cf\u304f"},"content":{"rendered":"

\u96fb\u78c1\u6c17\u5b66\u306e\u6388\u696d\u306e\u6e96\u5099\u300cgnuplot \u3067\u30d9\u30af\u30c8\u30eb\u5834\uff08\u96fb\u5834\u30fb\u78c1\u5834\uff09\u3092\u63cf\u304f<\/a>\u300d\u306e Maxima \u7248\u3002
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\u70b9\u96fb\u8377\u304c\u3064\u304f\u308b\u96fb\u5834 $\\boldsymbol{E}$<\/h3>\n

\\begin{eqnarray}
\n\\boldsymbol{E}
\n&=& \\frac{q_1}{4\\pi \\varepsilon_0} \\frac{\\boldsymbol{r} – \\boldsymbol{r}_1}{|\\boldsymbol{r} – \\boldsymbol{r}_1|^3}\\end{eqnarray}<\/p>\n

$z=0$ \u306e $xy$ \u5e73\u9762\u30672\u6b21\u5143\u30d9\u30af\u30c8\u30eb\u5834\u3092\u63cf\u304f\u3002<\/p>\n

$$\\boldsymbol{r} = (x, y, 0), \\quad \\boldsymbol{r}_1 = (x_1, y_1, 0)$$$$E_x = s \\frac{x-x_1}{\\left((x-x_1)^2 + (y-y_1)^2\\right)^{3\/2}}$$$$E_y = s \\frac{y-y_1}{\\left((x-x_1)^2 + (y-y_1)^2\\right)^{3\/2}}$$<\/p>\n

$s$ \u306f $\\mbox{scaling}$ \u4fc2\u6570\u3002\u5b9f\u969b\u306e\u63cf\u753b\u306e\u969b\u306b\u30d9\u30af\u30c8\u30eb\u306e\u9577\u3055\u3092\u5fae\u8abf\u6574\u3059\u308b\u4fc2\u6570\u3002<\/p>\n