xCoba MetricCompute issues

[Jolyon Bloomfield]

Hi folks,

I've been trying to rerun some older notebooks, and xCoba seems to be having some issues that it didn't use to have. In particular, MetricCompute no longer wants to compute anything beyond ChristoffelCDPDB when I tell it to compute everything.

Minimal example:

<< xAct`xCoba`
DefManifold[M, 3, {a, b, c, d, e, f, g, h, i, j, k, l}]
DefMetric[-1, metric[-a, -b], CD, PrintAs -> "g"]
DefChart[B, M, {0, 1, 2}, {x[], y[], z[]}]
MetricInBasis[metric, -B, IdentityMatrix[3]]
MetricCompute[metric, B, All, CVSimplify -> Simplify]

Any suggestions?

Thanks,
Jolyon

[Alfonso Jacinto García Parrado Gómez Lobo]

Hi Jolyon,

could you use the option Verbose->True of MetricCompute and check the output?. Please check also the variable $Tensors to find out what has been actually computed. If there are still problems report the version of Mathematica you are using.

Thanks,

Alfonso.

---

From: xa...@googlegroups.com [xa...@googlegroups.com] on behalf of Jolyon Bloomfield [jk...@cornell.edu]
Sent: Thursday, August 25, 2016 3:43 AM
To: xAct Tensor Computer Algebra
Subject: [xAct: 1856] xCoba MetricCompute issues

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[Jolyon Bloomfield]

Hi Alfonso,

Thanks for getting back to me. It looks like I'm used to seeing the verbose output by default, and something changed at some point to default to non-verbose. Everything is still being computed, my mistake.

Thanks,
Jolyon