{"id":1871,"date":"2022-05-09T12:00:15","date_gmt":"2022-05-09T03:00:15","guid":{"rendered":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/?p=1871"},"modified":"2023-03-14T16:53:34","modified_gmt":"2023-03-14T07:53:34","slug":"%e7%90%83%e5%af%be%e7%a7%b0%e3%83%bb%e7%9c%9f%e7%a9%ba%e3%81%aa%e3%82%89%e3%81%b0%e5%bf%85%e3%81%9a%e9%9d%99%e7%9a%84%e3%81%a7%e6%bc%b8%e8%bf%91%e7%9a%84%e3%81%ab%e5%b9%b3%e5%9d%a6%e3%81%8b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/1871\/","title":{"rendered":"\u7403\u5bfe\u79f0\u30fb\u771f\u7a7a\u306a\u3089\u3070\u5fc5\u305a\u9759\u7684\u3067\u6f38\u8fd1\u7684\u306b\u5e73\u5766\u304b\uff1f"},"content":{"rendered":"<ul>\n<li><a href=\"https:\/\/ja.wikipedia.org\/wiki\/%E3%83%90%E3%83%BC%E3%82%B3%E3%83%95%E3%81%AE%E5%AE%9A%E7%90%86\">\u30d0\u30fc\u30b3\u30d5\u306e\u5b9a\u7406 (Jebsen-Birkhoff&#8217;s Theorem) &#8211; Wikipedia<\/a><\/li>\n<\/ul>\n<p><!--more--><br \/>\n\u4e0a\u8a18\u306e Wikipedia \u306b\u3088\u308c\u3070\uff0c\u30d0\u30fc\u30b3\u30d5\u306e\u5b9a\u7406\uff08\u30d0\u30fc\u30b3\u30d5\u306e2\u5e74\u524d\u306b\u30a4\u30a7\u30d6\u30bb\u30f3\u304c\u767a\u898b\u3057\u3066\u305f\u3089\u3057\u3044\uff09\u3068\u306f\u300c\u4e00\u822c\u76f8\u5bfe\u6027\u7406\u8ad6\u306b\u304a\u3044\u3066\uff0c<span style=\"font-family: helvetica, arial, sans-serif;\"><strong>\u771f\u7a7a\u5834<\/strong><\/span>\u306e\u65b9\u7a0b\u5f0f\u306e<span style=\"font-family: helvetica, arial, sans-serif;\"><strong>\u7403\u5bfe\u79f0\u89e3<\/strong><\/span>\u306f<span style=\"font-family: helvetica, arial, sans-serif;\"><strong>\u5fc5\u305a\u9759\u7684\u3067\u6f38\u8fd1\u7684\u5e73\u5766\u3067\u3042\u308b<\/strong><\/span>\u300d\u3068\u3044\u3046\u5b9a\u7406\u3067\u3042\u308b\u3002\u3053\u306e\u5b9a\u7406\u306b\u3064\u3044\u3066\u304a\u3055\u3089\u3044\u3057\uff0c\u307b\u3093\u3068\u306b\u300c\u5fc5\u305a\u9759\u7684\u3067\u6f38\u8fd1\u7684\u5e73\u5766\u306b\u306a\u308b\u306e\uff1f\u300d\u3068\u3044\u3046\u554f\u3044\u304b\u3051\u3092\u3057\u3066\u307f\u308b\u3002<\/p>\n<p>\u30e9\u30f3\u30c0\u30a6\u30fb\u30ea\u30d5\u30b7\u30c3\u30c4\u300c\u5834\u306e\u53e4\u5178\u8ad6\u300d\u00a7100. \u4e2d\u5fc3\u5bfe\u79f0\u306a\u91cd\u529b\u5834\uff0c\u306e\u9805\u306a\u3069\u3092\u53c2\u8003\u306b\u3057\u3066\u307e\u3068\u3081\u308b\u3002<\/p>\n<h3>\u7403\u5bfe\u79f0\u6642\u7a7a\u306e\u8a08\u91cf<\/h3>\n<p>\u7403\u5bfe\u79f0\u6642\u7a7a\u306e\u8a08\u91cf\u306f\uff0c\u6642\u9593\u4f9d\u5b58\u6027\u3082\u6700\u521d\u306f\u6392\u9664\u3057\u306a\u3044\u3068\u3059\u308c\u3070\uff0c\u4e00\u822c\u306b<\/p>\n<p>$$ds^2 = &#8211; N^2(r,t) dt^2 + A^2(r,t) dr^2 + B^2(r, t) (d\\theta^2 + \\sin^2\\theta d\\phi^2)$$<\/p>\n<h3>\u7403\u5bfe\u79f0\u6642\u7a7a\u306e\u8a08\u91cf\uff1a$\\dot{B} = 0$ \u306e\u5834\u5408<\/h3>\n<p>\u4ee5\u4e0a\u306e\u3088\u3046\u306b\u66f8\u3051\u308b\u3068\u601d\u3046\u306e\u3060\u304c\uff0c\u300c\u5834\u306e\u53e4\u5178\u8ad6\u300d\u3092\u306f\u3058\u3081\u3068\u3057\u305f\u307b\u3068\u3093\u3069\u306e\u30c6\u30ad\u30b9\u30c8\u3067\u306f\uff0c\u4e00\u822c\u6027\u3092\u5931\u3046\u3053\u3068\u306a\u304f\u3055\u3089\u306b<br \/>\n$$\\frac{\\partial B}{\\partial t} = \\dot{B} = 0 \\quad\\Rightarrow B = B(r) \\equiv r$$<\/p>\n<p>\u3068\u3057\uff0c\u4ee5\u4e0b\u306e\u8a08\u91cf\u304b\u3089\u8a08\u7b97\u3092\u306f\u3058\u3081\u3066\u3044\u308b\u3002<\/p>\n<p>$$ds^2 = &#8211; N^2(r,t) dt^2 + A^2(r,t) dr^2 + r^2 (d\\theta^2 + \\sin^2\\theta d\\phi^2)$$<\/p>\n<p>\u3053\u306e\u8a08\u91cf\u304c\u771f\u7a7a\u306e\u30a2\u30a4\u30f3\u30b7\u30e5\u30bf\u30a4\u30f3\u65b9\u7a0b\u5f0f\u3092\u6e80\u305f\u3059\u305f\u3081\u306b\u306f\uff0c\u6642\u7a7a\u304c\u300c\u9759\u7684\u300d\u3064\u307e\u308a $\\dot{N} = \\dot{A} = 0$ \u3067\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\uff0c\u3068\u3044\u3046\u3053\u3068\u306f\uff0c\u4ee5\u4e0b\u306e\u3088\u3046\u306b<a href=\"https:\/\/home.hirosaki-u.ac.jp\/relativity\/%e4%b8%80%e8%88%ac%e7%9b%b8%e5%af%be%e8%ab%96%e7%9a%84%e5%ae%87%e5%ae%99%e8%ab%96\/%e8%86%a8%e5%bc%b5%e5%ae%87%e5%ae%99%e3%81%ae%e8%a8%88%e9%87%8f%e3%81%ae%e5%b0%8e%e5%87%ba%e3%81%a8%e3%83%95%e3%83%aa%e3%83%bc%e3%83%89%e3%83%9e%e3%83%b3%e6%96%b9%e7%a8%8b%e5%bc%8f\/%e8%a3%9c%e8%b6%b3%ef%bc%9a%e3%82%a2%e3%82%a4%e3%83%b3%e3%82%b7%e3%83%a5%e3%82%bf%e3%82%a4%e3%83%b3%e6%96%b9%e7%a8%8b%e5%bc%8f%e3%81%ae-31-%e5%ae%9a%e5%bc%8f%e5%8c%96\/\">\u30a2\u30a4\u30f3\u30b7\u30e5\u30bf\u30a4\u30f3\u65b9\u7a0b\u5f0f\u306e $3+1$ \u5b9a\u5f0f\u5316<\/a>\u3092\u4f7f\u3063\u3066\u793a\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n<h4>3+1 \u5b9a\u5f0f\u5316\u306b\u3088\u308b\u9759\u7684\u3067\u3042\u308b\u3053\u3068\u306e\u8a3c\u660e<\/h4>\n<p>\u771f\u7a7a $T_{\\mu\\nu} = 0$ \u306e\u5834\u5408\u306e\u30a2\u30a4\u30f3\u30b7\u30e5\u30bf\u30a4\u30f3\u65b9\u7a0b\u5f0f\u306e $3+1$ \u8868\u793a\u306f\uff0c<\/p>\n<p>$$G_{00} = \\frac{N^2}{2} \\left( \\left(K^i_{\\ \\ i} \\right)^2 &#8211; K^i_{\\ \\ j} K^j_{\\ \\ i} + {}^{(3)}\\!R^i_{\\ \\ i}\\right) = 0 \\tag{1}$$<\/p>\n<p>$$G_{0i} = N \\left(K^j_{\\ \\ i|j} &#8211; K^j_{\\ \\ j|i} \\right) = 0 \\tag{2}$$<\/p>\n<p>$$R^i_{\\ \\ j} = \\frac{1}{N} \\dot{K}^i_{\\ \\ j} + K^k_{\\ \\ k} K^i_{\\ \\ j} &#8211; \\frac{1}{N} N^{|i}_{\\ \\ |j} + {}^{(3)}\\!R^i_{\\ \\ j} = 0 \\tag{3}$$<\/p>\n<p>\u3053\u3053\u3067\uff0c<\/p>\n<p>$$K^i_{\\ \\ j}\u00a0 \\equiv \\frac{1}{2N} g^{ik} \\dot{g}_{kj}$$<\/p>\n<p>\u3060\u304c\uff0c\u4e0a\u8a18\u306e\u7403\u5bfe\u79f0\u8a08\u91cf\u3092\u4f7f\u3046\u3068 $K^i_{\\ \\ j}$ \u306e\u3046\u3061\u30bc\u30ed\u3067\u306a\u3044\u6210\u5206\u306f<br \/>\n$$K^1_{\\ \\ 1} = \\frac{\\dot{A}}{NA}$$<\/p>\n<p>\u3060\u3051\u3067\u3042\u308a\uff0c\u4ed6\u306e\u3059\u3079\u3066\u306e\u6210\u5206\u306f\u30bc\u30ed\u3067\u3042\u308b\u3002\u3059\u308b\u3068\uff0c$(2)$ \u5f0f\u306e $i=1$ \u6210\u5206\u304b\u3089<\/p>\n<p>\\begin{eqnarray}<br \/>\nK^j_{\\ \\ 1|j} &#8211; K^j_{\\ \\ j|1} &amp;=&amp; K^1_{\\ \\ 1,1}<br \/>\n+ {}^{(3)}\\!\\varGamma^j_{\\ \\ j 1} K^1_{\\ \\ 1} &#8211; {}^{(3)}\\!\\varGamma^1_{\\ \\ 1 1} K^1_{\\ \\ 1} &#8211; K^1_{\\ \\ 1,1} \\\\<br \/>\n&amp;=&amp; \\frac{2}{r} K^1_{\\ \\ 1} \\\\<br \/>\n&amp;=&amp; 0<br \/>\n\\end{eqnarray}<\/p>\n<p>\u3088\u308a\uff0c\u305f\u3060\u3061\u306b<\/p>\n<p>$$K^1_{\\ \\ 1} = 0, \\quad\\therefore\\ \\ \\dot{A} = 0$$<\/p>\n<p>\u3053\u308c\u3088\u308a\uff0c3\u6b21\u5143\u8a08\u91cf $g_{ij}$ \u306f\u5168\u3066\u306e\u6210\u5206\u304c\u6642\u9593\u306b\u4f9d\u5b58\u3057\u306a\u304f\u306a\u308b\u306e\u3067\uff0c${}^{(3)}\\!R^i_{\\ \\ j}$ \u3082\u6642\u9593\u306b\u4f9d\u5b58\u3057\u306a\u304f\u306a\u308a\uff0c$(3)$ \u5f0f\u304b\u3089 $N$ \u3082\u6642\u9593\u306b\u4f9d\u5b58\u3057\u306a\u3044\u3053\u3068\u304c\u308f\u304b\u308b\u3002<\/p>\n<p>\u3053\u306e\u3088\u3046\u306b\u3057\u3066\uff0c<br \/>\n$$K^1_{\\ \\ 1} = 0 \\quad\\Rightarrow \\frac{\\partial g_{\\mu\\nu}}{\\partial t} = 0$$<\/p>\n<p>\u3068\u306a\u308a\uff0c\u3053\u306e\u8a08\u91cf\u306f\u6642\u9593\u5ea7\u6a19\u306b\u4f9d\u5b58\u3057\u306a\u3044\u300c\u9759\u7684\u300d\u306a\u8a08\u91cf\u3068\u306a\u308b\u3002<\/p>\n<p>\u3042\u3068\u306f\uff0c\u5b9f\u969b\u306b\u8a73\u7d30\u3092\u89e3\u3044\u3066\u3044\u304f\u3068<\/p>\n<p>$$ N^2 = \\frac{1}{A^2} = 1 + \\frac{\\mbox{const.}}{r}$$<\/p>\n<p>\u3068\u306a\u308a\uff0c\u6f38\u8fd1\u7684\u306b\u5e73\u5766\u306a\u30b7\u30e5\u30d0\u30eb\u30c4\u30b7\u30eb\u30c8\u6642\u7a7a\u304c\u5f97\u3089\u308c\u308b&#8230; \u3068\u3044\u3046\u306e\u304c\u8a3c\u660e\u306e\u6d41\u308c\u3002<\/p>\n<p><span style=\"font-family: helvetica, arial, sans-serif; color: #ff0000;\"><strong>\u30d0\u30fc\u30b3\u30d5\u306e\u5b9a\u7406\u306e\u8a3c\u660e\u306b\u306f\uff0c\\(\\dot{B} = 0\\) \u3068\u3044\u3046\u8a2d\u5b9a\u304c\u30ad\u30e2\u3068\u306a\u308b<\/strong><\/span>\u3002<\/p>\n<h3>\u7403\u5bfe\u79f0\u6642\u7a7a\u306e\u8a08\u91cf\uff1a$\\dot{B} \\neq 0$ \u306e\u5834\u5408\u306f\uff1f<\/h3>\n<p>$$ds^2 = &#8211; N^2(r,t) dt^2 + A^2(r,t) dr^2 + B^2(r, t) (d\\theta^2 + \\sin^2\\theta d\\phi^2)$$<\/p>\n<p>\u3053\u306e\u5f62\u306e\u307e\u307e\uff0c$B(r,t)$ \u306e\u6642\u9593\u4f9d\u5b58\u6027\u3082\u8a8d\u3081\u3066\u307f\u308b\u3068\uff0c\u4f8b\u3048\u3070\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u771f\u7a7a\u89e3\u304c\u5b58\u5728\u3059\u308b\u3053\u3068\u304c\u3088\u304f\u77e5\u3089\u308c\u3066\u3044\u308b\u3002<\/p>\n<ul>\n<li><a href=\"https:\/\/home.hirosaki-u.ac.jp\/relativity\/1875\/\">EinsteinPy \u306e\u4f7f\u7528\u4f8b\uff1a\u7403\u5bfe\u79f0\u771f\u7a7a\u975e\u9759\u7684\u30e1\u30c8\u30ea\u30c3\u30af<\/a><\/li>\n<li><a href=\"https:\/\/home.hirosaki-u.ac.jp\/relativity\/1873\/\">Maxima \u306e ctensor \u306e\u4f7f\u7528\u4f8b\uff1a\u7403\u5bfe\u79f0\u771f\u7a7a\u975e\u9759\u7684\u30e1\u30c8\u30ea\u30c3\u30af<\/a><\/li>\n<\/ul>\n<p>$$ds^2 = -d\\tau^2 + \\frac{dR^2}{\\left(\\frac{3}{2}(R-\\tau)\\right)^{2\/3}}<br \/>\n+ \\left(\\frac{3}{2}(R-\\tau)\\right)^{4\/3} (d\\theta^2 + \\sin^2\\theta d\\phi^2) \\tag{4}$$<\/p>\n<p>\\begin{eqnarray}<br \/>\nds^2 &amp;=&amp; -dt^2 + t^2 \\left(\\frac{dr^2}{1 + r^2} + r^2(d\\theta^2 + \\sin^2\\theta d\\phi^2) \\right) \\tag{5}<br \/>\n\\end{eqnarray}<\/p>\n<p>\u4f55\u3092\u8a00\u3044\u305f\u3044\u306e\u304b\u3068\u3044\u3046\u3068\uff0c\u300c<span style=\"font-family: helvetica, arial, sans-serif; color: #ff0000;\"><strong>\u7403\u5bfe\u79f0\u771f\u7a7a\u3068\u3044\u3046\u6761\u4ef6\u304b\u3089\u305f\u3060\u3061\u306b \\(\\dot{B}=0\\) \u304c\u5c0e\u304b\u308c\u308b\u3068\u3044\u3046\u3082\u306e\u3067\u306f\u306a\u3044<\/strong><\/span>\u300d\u3068\u3044\u3046\u3053\u3068\u3002<\/p>\n<p>$(4)$ \u5f0f\u306f\u5ea7\u6a19\u5909\u63db\u306b\u3088\u3063\u3066\u9759\u7684\u306a\u30b7\u30e5\u30d0\u30eb\u30c4\u30b7\u30eb\u30c8\u8a08\u91cf\u306b\u306a\u308b\u3053\u3068\u304c\u308f\u304b\u3063\u3066\u3044\u308b\u306e\u3067\uff0c\u307e\u3041\u3088\u3057\u3068\u3057\u3088\u3046\u3002\uff08\u5b9f\u969b\u306b\u306f\u30eb\u30e1\u30fc\u30c8\u30eb\u5ea7\u6a19\u3067\u8868\u3057\u305f\u30b7\u30e5\u30d0\u30eb\u30c4\u30b7\u30eb\u30c8\u8a08\u91cf\u3067 \\(r_g = 1\\) \u3068\u3057\u305f\u3082\u306e\u3067\u3059\u3002\uff09<\/p>\n<p>\u3057\u304b\u3057\uff0c$(5)$ \u5f0f\u306f FLRW \u8a08\u91cf\u3092\u4f7f\u3063\u305f\u30d5\u30ea\u30fc\u30c9\u30de\u30f3\u65b9\u7a0b\u5f0f\u3067\uff0c$\\Omega_{\\rm m} = \\Omega_{\\Lambda} = 0$ \u3068\u3057\u305f\u3068\u304d\u306e\u89e3\u3067\uff0c<span style=\"font-family: helvetica, arial, sans-serif;\"><strong>\u30df\u30eb\u30f3\u5b87\u5b99<\/strong><\/span>\u3068\u547c\u3070\u308c\u3066\u3044\u308b\u3002<\/p>\n<p>\u7403\u5bfe\u79f0\u771f\u7a7a\u3068\u3044\u3046\u6761\u4ef6\u3060\u3051\u3067\u306f\uff0c\u30df\u30eb\u30f3\u5b87\u5b99\u306e\u5b58\u5728\u3092\u6392\u9664\u3067\u304d\u306a\u3044\u3068\u601d\u308f\u308c\u308b\u3002\u305d\u308c\u3068\u3082\uff0c\u30df\u30eb\u30f3\u5b87\u5b99\u306e\u8a08\u91cf\u3082\u9069\u5f53\u306a\u5ea7\u6a19\u5909\u63db\u3067\u30b7\u30e5\u30d0\u30eb\u30c4\u30b7\u30eb\u30c8\u8a08\u91cf\u306b\u306a\u308b\u306e\u3067\u3042\u308d\u3046\u304b\uff1f<\/p>\n<p>\u8ab0\u304b\uff0c\u30a8\u30e9\u30a4\u4eba\uff0c\u6559\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<hr \/>\n<p>&#8230; \u3068\u3057\u3070\u3089\u304f\u60a9\u3093\u3067\u3044\u305f\u304c\uff0cMTW \u306e 27.11 \u306b\u3061\u3083\u3093\u3068\u66f8\u3044\u3066\u3042\u308a\u307e\u3057\u305f\u3002\u30df\u30eb\u30f3\u5b87\u5b99\u306f\u7c21\u5358\u306a\u5ea7\u6a19\u5909\u63db\u3067\uff08\u30b7\u30e5\u30d0\u30eb\u30c4\u30b7\u30eb\u30c8\u8a08\u91cf\u3069\u3053\u308d\u3067\u306f\u306a\u304f\uff09<span style=\"font-family: helvetica, arial, sans-serif;\"><strong>\u30df\u30f3\u30b3\u30d5\u30b9\u30ad\u30fc\u8a08\u91cf<\/strong><\/span>\u306b\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<p>\u306a\u306e\u3067\uff0c\u3059\u308f\uff01\u30d0\u30fc\u30b3\u30d5\u306e\u5b9a\u7406\uff0c\u7834\u308c\u305f\u308a!? \u306a\u3069\u3068\u65e9\u5408\u70b9\u3057\u306a\u3044\u3088\u3046\u306b\u3002\uff08\u79c1\u306f\u601d\u308f\u305a\u65e9\u5408\u70b9\u3057\u3066\u3057\u307e\u3046\u3068\u3053\u308d\u3067\u3057\u305f\u3002\uff09<\/p>\n<p><a href=\"https:\/\/home.hirosaki-u.ac.jp\/relativity\/%e4%b8%80%e8%88%ac%e7%9b%b8%e5%af%be%e8%ab%96%e7%9a%84%e5%ae%87%e5%ae%99%e8%ab%96\/%e5%ae%87%e5%ae%99%e8%ab%96%e3%83%91%e3%83%a9%e3%83%a1%e3%83%bc%e3%82%bf%e3%81%a8%e5%ae%87%e5%ae%99%e5%b9%b4%e9%bd%a2\/%e8%a3%9c%e8%b6%b3%ef%bc%9a%e3%82%b9%e3%82%b1%e3%83%bc%e3%83%ab%e5%9b%a0%e5%ad%90%e3%81%ae%e8%a7%a3\/#Omega_rm_m_0_Omega_Lambda_0\">\u3053\u306e\u3078\u3093<\/a>\u306b\u8ffd\u8a18\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<ul>\n<li>\u30d0\u30fc\u30b3\u30d5\u306e\u5b9a\u7406 (Jebsen-Birkhoff&#8217;s Theorem) &#8211; Wikipedia<\/li>\n<\/ul>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[20],"tags":[],"class_list":["post-1871","post","type-post","status-publish","format-standard","hentry","category-rel-cosmo","nodate","item-wrap"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/wp-json\/wp\/v2\/posts\/1871","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/wp-json\/wp\/v2\/comments?post=1871"}],"version-history":[{"count":12,"href":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/wp-json\/wp\/v2\/posts\/1871\/revisions"}],"predecessor-version":[{"id":2969,"href":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/wp-json\/wp\/v2\/posts\/1871\/revisions\/2969"}],"wp:attachment":[{"href":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/wp-json\/wp\/v2\/media?parent=1871"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/wp-json\/wp\/v2\/categories?post=1871"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/home.hirosaki-u.ac.jp\/relativity\/wp-json\/wp\/v2\/tags?post=1871"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}