I am unable to download xAct can someone help ? The website for xAct is not opening, is there any other way I can download it ?
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2$\begingroup$ The service provider where I host xAct implemented some changes earlier in August and the xAct web got broken in the process. I hope to get it running again soon. If you need to download anything, please contact me at [email protected] . $\endgroup$– joseCommented Aug 11 at 19:08
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1 Answer
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Main page of
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Main page of xAct
Wayback Machine archived main page of xAct:
https://web.archive.org/web/20230320122045/http://xact.es/index.html
Download
Use the download link URL provided by Wayback Machine to download:
https://web.archive.org/web/20230317212020/http://xact.es/download/xAct_1.2.0.zip https://web.archive.org/web/20230317212020/http://xact.es/download/xAct_1.2.0.tgz
Install
Assuming you are using Windows OS,
Wolfram Mathematica -> File -> Install
Type of Item to Install: Application
Source: the xAct_1.2.0.zip file
Test
ClearAll["Global`*"];
<< xAct`xTensor`;
DefManifold[M3, 3, {a, b, c, d, e}]
DefTensor[v[a], M3]
DefTensor[F[-a, -b], M3, Antisymmetric[{-a, -b}]]
F[-a, -b] v[b]
Simplification[%]
F[-a, -d] v[d] v[b] v[-b] +
3 v[b] v[c] v[-c] F[-b, d] F[-d, -a]
% // Simplification
DefCovD[Cd[-a], {";", "\[Del]"}]
Cd[-a][F[-b, -c] v[c]]
