ConstructDDIs error

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Gurmeet Singh

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Feb 17, 2022, 1:23:20 AM2/17/22
to xAct Tensor Computer Algebra
Hello everyone,

I'm trying to construct some identities using the "ConstructDDIs" command.  But this command is not working. Any idea/suggestion on how to do it.

Thanks in advance.

test file.nb

Jose

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Feb 17, 2022, 5:44:37 PM2/17/22
to xAct Tensor Computer Algebra
Hi,

If I understand correctly how this xTras command works, you need to define your manifold as

   DefManifold[Mdim, dim, {α,β,γ,δ,μ,ν,λ,σ,ζ,χ,τ,ω}]

using the constant symbol dim defined by xTras, and then choose a value (say dim = 4) before doing the ConstructDDIs computation. If the dimension you choose is large enough, then you will not get any DDI.

Cheers,
Jose.
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