Trac 14789: hyperplane arrangement package
split up into manageable source files
implemented linear expressions
Ported hyperplanes and arrangements to linear expressions
added remaining functionality, fixed documentation
lazy import hyperplane arrangements
made the construction of the regions much faster
new vertices() method to compute the vertices of the arrangement
Merge branch 'master' into ticket/14789
Initial documentation fixes.
More fixes and pyflakes cleanup.
Doctest fixes.
Fixed long doctest.
Trac #13394: Implement faster and safer WeakValueDictionary
# Sat Oct 19 11:50:04 2013 +0200

# Node ID f98c0b44c17dbb718c8449f3eabcbc7b8bdc825d
# Parent  2306f17ea8f3e40d1a3668c24695a50bfad34d1f
#10963: More functorial constructions
# Sun Oct 27 13:58:49 2013 +0100

# Node ID 70a11b0abddbee6bfbac4103147808fc1a792647
# Parent  df8fdfb31c4eca2d3761f268e3f41ceb9a6aeb81
trac #10963 doctests corrections
# Tue Oct 29 20:14:19 2013 +0100

# Node ID e374533eb4a23dfff21146ffe4834ae93ca70769
# Parent  599ab9a6bd8d8015fb6c6247fcfbd27912c9f0d3
#10963: More functorial constructions (fix graded modules with basis)
merging sage/categories/category.py
Merge branch 'master' into 10963
duplication introduced in my own merge removed