#19823: Addcode for computation of the Schouten, Cotton, and Cotton-York
tensors of
a riemannian metric
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Reporter: pang | Owner: pang
Type: enhancement | Status: needs_review
Priority: trivial | Milestone:
Component: geometry | Resolution:
Keywords: differentiable | Merged in:
manifold, Riemannian metric, | Reviewers: Eric Gourgoulhon
Cotton tensor, Cotton-York | Work issues:
tensor, Schouten tensor | Commit:
Authors: pang | 8d3ba1970060132348b8861b74933a9f4efff08f
Report Upstream: N/A | Stopgaps:
Branch: |
public/manifolds/Schouten_Cotton_York|
Dependencies: #19209 |
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Comment (by egourgoulhon):
Replying to [comment:6 pang]:
> The tests take really long to run on my (rather old) laptop. I can't
come up with examples that are meaningful and take less than 5 seconds to
compute. How should I proceed?
Since the minimal non-trivial examples have to be at least 3-dimensional,
it seems quite difficult to shorten signifcantly your examples. Moreover,
the time taken by them (around 10 to 20 s for each of the 3 tensors) is
similar to that taken in other parts of !SageManifolds, e.g. in affine
connections (ticket #19147). So for the moment, I would leave it as it
is...
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Ticket URL: <http://trac.sagemath.org/ticket/19823#comment:9>
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