Improve doctests of Degenerate Submanifold

[kliem]

The doctests in sage -t src/sage/manifolds/differentiable/degenerate_submanifold.py have problems with time outs.

See for example:

• [#29104 comment:61]
• https://groups.google.com/d/msg/sage-release/eMQIlhglN98/bTwDGD9HBQAJ
• [#27122 comment:33]

Part of the problem might be, that the file makes no use of long time flags (testing takes 86 seconds on a fast computer without --long).

We add those flags and some smaller examples to display functionality of the module. This brings down testing time without `--long`` to less than 30 seconds.

CC: @sagetrac-Dicolevrai @egourgoulhon @mkoeppe

Component: geometry

Keywords: degenerate manifolds

Author: Jonathan Kliem

Branch/Commit: 848fec0

Reviewer: Hans Fotsing Tetsing

Issue created by migration from https://trac.sagemath.org/ticket/29440

[kliem]

Branch: public/29440

[kliem]

New commits:

ef94ca5

use # long time and add a smaller example

[kliem]

Commit: ef94ca5

[sagetrac-git]

Changed commit from ef94ca5 to 848fec0

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1. New commits:

848fec0

removed redundant import

[sagetrac-Dicolevrai]

Replying to @kliem:

The doctests in sage -t src/sage/manifolds/differentiable/degenerate_submanifold.py have problems with time outs.

See for example:

• [#29104 comment:61]
• https://groups.google.com/d/msg/sage-release/eMQIlhglN98/bTwDGD9HBQAJ
• [#27122 comment:33]

Part of the problem might be, that the file makes no use of long time flags (testing takes 86 seconds on a fast computer without --long).

We add those flags and some smaller examples to display functionality of the module. This brings down testing time without `--long`` to less than 30 seconds.

Thank you so much for the improvement and the example!

[fchapoton]

comment:5

please add missing reviewer full name