floor() and ceil() for real algebraic numbers
Add regression test.
trunc() for rational numbers
round() and trunc() for real algebraic numbers
Permutations()(xs) is faster and better than Permutation(xs) when xs is known to be in 1-line notation (faster than Permutation(xs, check=False) even), hence replaced; also, doc improved
user-defined base rings for a and b functions
possibly somewhat illiterate fix of the 'mult'-dependency of the seminormal form
doc fixes to descent algebra due to nonstandard permutation product
trunc() in AA: make default prec consistent with that used by !=
Merge branch 'develop' into seminormal
Merge branch 'develop' into seminormal
descent algebra docstring now also gives a dictionary to Schocker's paper
retracts on permutations, and corrections to my seminormal doc
retracts now also on symmetric group algebra
Merge branch 'public/combinat/seminormal' of trac.sagemath.org:sage into public/combinat/seminormal-15650
Some more misc tweaks.
faster way to compute Jucys-Murphy elements in Hecke algebra
More review changes.
Some more tweaks and added a reference for seminormal representations.
Wrong formatting for docstring.