Make matrix repr for large matrices not trawl the call stack and move that functionality to displayhook instead.
Fixed failing doctest.
trac #15036: remove redundant import statement
Some fixes to TransitiveIdeal and TransitiveIdealGraded, added RecursiveSet factory
Cleaning RecursiveSet and subclasses
now 100% coverage, seeds instead of gens
Cleaning documentation and reverting some changes to TransitiveIdeals
implemented depth search with stack and breadth search with queue
moving RecursivelyEnumerableSet to sage/sets
doc fixes + adding Parent and category
deprecate import of TransitiveIdeal + level method for RecursivelyEnumeratedSet
level -> graded component, algorithm -> enumeration, more docs, deprecated SearchForest also
succ -> successors, fixed doctests in backtrack.py
remove deprecated code from #11033
remove deprecated code from #8930
remove deprecated code from #13211
remove deprecated code from #12587
remove deprecated code from #7371 and #10334
remove deprecated code from coxeter_groups
Allows constructing a subclass of LabelledTree from a LT