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2017-02-16 05:08:13 -0600 received badge  Famous Question (source)
2016-11-12 18:00:36 -0600 answered a question Sage 7.4 : sage -i database_gap hangs

For the above problem, I used the Ubuntu 16.04 binary x86_64 distribution of sage 7.4 (from the sage web site).

Then I compiled sage 7.4 (2 hours 43 minutes with 4 Intel 6600k cores @ 4.4 GHz with solid state drives), then did a

./sage -i database_gap

which completed ok, and was able to access the SmallGroup database with

gap.eval ("SmallGroup (1,1)").

So it looks like a problem in the binary distribution.

2016-11-12 14:52:02 -0600 received badge  Editor (source)
2016-11-12 13:55:57 -0600 asked a question Sage 7.4 : sage -i database_gap hangs

Using Sage 7.4 on Ubuntu 16.04, x86_64. The above command tries to load database_gap-4.8.3, but hangs after the messages:

[database_gap-4.8.3] Installed small group database.

[database_gap-4.8.3] Installed prim database.

[database_gap-4.8.3] Installed trans database.

[database_gap-4.8.3] Installed tomlib database.

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2016-02-26 17:13:52 -0600 asked a question pseudo-inverse of a Zmod(2) matrix

I have a 25 x 25 Zmod(2) matrix that is singular, and I would like to find the pseudo-inverse. I haven't found anything yet that will work. Suggestions?