{"type":"rich","description":"\u8ffd\u8a18. \u6b21\u306e\u30b5\u30a4\u30c8\u304c\u53c2\u8003\u306b\u306a\u308b\u3088\u3046\u306b\u601d\u308f\u308c\u307e\u3059. stanford.edu 2019\u5e744\u670821\u65e5\u306b\u6e67\u6e90\u30af\u30e9\u30d6\u306e\u65e5\u66dc\u30b5\u30ed\u30f3\u3067\u306e\u8b1b\u6f14\u306b\u3080\u3051\u6e96\u5099\u3057\u305f\u539f\u7a3f\u3092\u6700\u8fd1\u767a\u6398\u3057\u305f\u306e\u3067, \u8a18\u4e8b\u3068\u3057\u3066\u307e\u3068\u3081\u76f4\u3057\u3066\u516c\u958b\u3057\u307e\u3059. \u8aac\u660e\u304c\u4e0d\u5341\u5206\u306a\u70b9\u304c\u591a\u304f\u898b\u53d7\u3051\u3089\u308c\u307e\u3059\u304c, \u8b1b\u6f14\u9332\u3068\u3057\u3066\u306e\u53f2\u6599\u6027\u3092\u9451\u307f\u3066\u539f\u6587\u30de\u30de\u3067\u6253\u3061\u8fbc\u3080\u3053\u3068\u306b\u3057\u307e\u3057\u305f. \u3042\u307e\u308a\u53c2\u8003\u306b\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044. 2.1 Classical electromagnetism (with no sources) follows from the action $$S=\\int d^{4}x\\left(-\\frac{1}{4}F_{\\mu\\nu}F^{\\mu\\nu}\\ri\u2026","provider_name":"Hatena Blog","author_name":"all_for_nothing","version":"1.0","author_url":"https://blog.hatena.ne.jp/all_for_nothing/","title":"Peskin, Schroeder 2.1(a) \u306b\u3064\u3044\u3066","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/a/all_for_nothing/20201013/20201013173921.png","width":"100%","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fall-for-nothing.com%2Fentry%2F2020%2F10%2F12%2F172447\" title=\"Peskin, Schroeder 2.1(a) \u306b\u3064\u3044\u3066 - \u7a7a\u8ad6\u4e0a\u306e\u7802\u3001\u697c\u95a3\u4e0a\u306e\u673a\u3002\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","published":"2020-10-12 17:24:47","url":"https://all-for-nothing.com/entry/2020/10/12/172447","height":"190","provider_url":"https://hatena.blog","categories":["\u7269\u7406"],"blog_url":"https://all-for-nothing.com/","blog_title":"\u7a7a\u8ad6\u4e0a\u306e\u7802\u3001\u697c\u95a3\u4e0a\u306e\u673a\u3002"}