Problem with TexAct

[Ananth Krishna]

Im facing issues with TexPrintAlignedEquations in TexAct

BianchiIDA = Collect[Bianchi[-1, -3, -1, -3, -4] // Simplify, NPCVComponents]

Equation1 = 0 == BianchiIDA

TexPrintAlignedEquations@Equation1

Im finally getting Hold[Throw["Tex Error"]] as my output. Can anyone help how to resolve this issue? I also attached my mathematica notebook.

[Thomas Bäckdahl]

Hi!

The first  problem comes from the output of
Tex@PDNP[{1, -NP}][PsiCD1[]]
which is
"\Psi _{1}{}{}_{\text{\c } 1}"
\c is not understood by the LaTeX compiler.
The quickest fix is probably
Tex["\[Cedilla]"] = ",";

Observe that TexAct will choose Prefix or Postfix notation from the $CovDFormat variable.

I suspect that you actually would like the Tex output to match the notation you have in this part of the notebook. You can do this with
$CovDFormat = "Prefix";
FormatTexBasis[PDNP[{1, -NP}], "D "];
FormatTexBasis[PDNP[{2, -NP}], "\\Delta "];
FormatTexBasis[PDNP[{3, -NP}], "\\delta "];
FormatTexBasis[PDNP[{4, -NP}], "\\bar\\delta "];

I can also recommend that you take a look at the SpinFrames package. With this you can probably make your notebook much shorter if you want.
I told a little bit about this package in the end of the 20 Years of xAct webinar
https://youtu.be/k_7s6_ZqV6M?list=PLdIcYTEZ4S8TSEk7YmJMvyECtF-KA1SQ2
https://amoeba.wolfram.com/index.php/s/ZxgjKXtJgALyCw4

Please let me know if you want more information or help.

Regards
Thomas

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