In the documentation for finite simplicial complexes it was described the function h_vector, but when I tried to use it, sage told me that there was not such a property for simplicial complexes. Where can it be the problem?
Could you edit your message to include a cut-and-paste of exactly what you did and what error message it returned? It seems to work for me just like in the examples, but I'm running Sage 4.6.2 and don't know about earlier versions:
sage: X = SimplicialComplex(3, [[0,1], [1,2], [2,3], [3,0]])
sage: X
Simplicial complex with vertex set (0, 1, 2, 3) and facets {(1, 2), (2, 3), (0, 3), (0, 1)}
sage: X.h_vector()
[1, 2, 1]
The patch for h-vectors was merged in Sage 4.6.2, so yes, you need to upgrade.
I also noticed that there where no h_vectors in the old documentation... However I messed everything up with the upgrade and now nothing is working (I didn't check before the right way to do it and try to reinstall everything from the begining). This is the situation now: when I run ./sage I get a long message telling at the end:
ImportError: libgfortran.so.3: cannot open shared object file: No such file or directory
Error importing ipy_profile_sage - perhaps you should run %upgrade?
WARNING: Loading of ipy_profile_sage failed.
then after running %upgrade I get the following
sage: %upgrade
> /home/emerson/sage-4.6.2/local/bin/python "/home/emerson/sage-4.6.2/local/lib/python2.6/site-packages/IPython/upgrade_dir.py" "/home/emerson/sage-4.6.2/local/lib/python2.6/site-packages/IPython/UserConfig" "/home/emerson/.sage/ipython"
/home/emerson/.sage/ipython/__init__.py: Unedited, installing new version
/home/emerson/.sage/ipython/ipy_user_conf.py: Unedited, installing new version
and then
sage: 1+1
---------------------------------------------------------------------------
NameError Traceback (most recent call last)
/home/emerson/sage-4.6.2/local/bin/<ipython console> in <module>()
NameError: name 'Integer' is not defined
I hope you can tell me what to do now...
Asked: 2011-03-25 06:44:51 +0100
Seen: 733 times
Last updated: Mar 29 '11
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