Deformation Expression for Elements of Algebra
  The purpose of this paper is to give a notion of deformation of expressions for elements of algebra.   Deformation quantization (cf.[BF]) deforms the commutative world to a non-commutative world. However, this involves deformation of expression of elements of algebras even from a commutative world to another commutative world. This is indeed a deformation of expressions for elements of algebra. 
H.Omori, Y.Maeda, N.Miyazaki, A.Yoshioka
math-ph math.MP