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r""" 

Root system features that are imported by default in the interpreter namespace 

""" 

from __future__ import absolute_import 

from sage.misc.lazy_import import lazy_import 

from .cartan_type import CartanType 

from .dynkin_diagram import DynkinDiagram 

from .cartan_matrix import CartanMatrix 

from .coxeter_matrix import CoxeterMatrix, coxeter_matrix 

from .coxeter_type import CoxeterType 

from .root_system import RootSystem, WeylDim 

from .weyl_group import WeylGroup, WeylGroupElement 

lazy_import('sage.combinat.root_system.reflection_group_real', 'ReflectionGroup') 

lazy_import('sage.combinat.root_system.extended_affine_weyl_group', 'ExtendedAffineWeylGroup') 

from .coxeter_group import CoxeterGroup 

from .weyl_characters import WeylCharacterRing, WeightRing 

from .branching_rules import BranchingRule, branching_rule_from_plethysm, branching_rule 

lazy_import('sage.combinat.root_system.non_symmetric_macdonald_polynomials', 'NonSymmetricMacdonaldPolynomials') 

lazy_import('sage.combinat.root_system.integrable_representations', 'IntegrableRepresentation')