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""" Abstract base class for algebras """
#***************************************************************************** # Copyright (C) 2005 William Stein <wstein@gmail.com> # # Distributed under the terms of the GNU General Public License (GPL) # # This code is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU # General Public License for more details. # # The full text of the GPL is available at: # # http://www.gnu.org/licenses/ #*****************************************************************************
from sage.rings.ring import Algebra from sage.categories.algebras import Algebras
def is_Algebra(x): r""" Return True if x is an Algebra.
EXAMPLES::
sage: from sage.algebras.algebra import is_Algebra sage: R.<x,y> = FreeAlgebra(QQ,2) sage: is_Algebra(R) True """
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