matrices for transformations between symmetric function bases should have their entries lie in the base ring
weird that this worked for QSym; still let's do it right
fix a mathematical mistake of mine
another attempt at breaking preservation of bugs
because [1,3,1,4] is in need of flattening
revisiting some high quality work...
Bernstein creation operators on Sym and NSym
manual merge
Merge branch 'public/combinat/witt-sf-fix' of trac.sagemath.org:sage into public/combinat/witt-sf-fix
Some review changes.
trac #16780: Brouwer's separable design construction of OA
trac #16780: review 1
trac #16780: Merged with #16859 (need the resolvable incomplete OA)
trac #16780: resolvable incomplete OA are built with 2 lines
trac #16780: review 2
trac #16780: repeat "parallel classes"
trac #16864: designs/database.py: auto-generated doc index
trac #16864: use Python string .format() + doc
Some fixes from me being stupid.
Fix for non-positive values of n.