From Trac patches: trac_12555.patch.
From Trac patches: trac_12555_review.patch.
From Trac patches: 12555_rebase_6223.patch.
From Trac patches: trac_12555_doc_improvements.patch​.
From Trac patches: trac_12555-pdf_fix-ts.patch.
Fixes for some missing/duplicated chunks.
A method to unset category initialisation
Allow unary negation and flip sign in the polar() method
face lattice posit now uses facade, so there is no element attribute any more
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.