Article ID Journal Published Year Pages File Type
401747 Journal of Symbolic Computation 2006 18 Pages PDF
Abstract

The theory of Gröbner basis for ideals can be applied in the non-associative, noncommutative free magma algebra K{X} with unit freely generated by a set X over a field K. In this article we introduce a class of admissible orders on the magma freely generated by X which is denoted by and some special admissible orders on . We prove that the reduced Gröbner basis of a multigraded ideal I in the multigraded algebra K{X} consists of the reduced multihomogeneous polynomials with multidegrees (α)∈Nn.We obtain a generalization for the Hilbert series of the multigraded algebra A=K{X}/J of residue classes modulo multigraded ideal J generated by multihomogeneous polynomials in the non-associative free magma algebra of tree polynomials K{X}, where X is a multigraded set of variables. It relates HA to GX, the generating series in n variables for X, and GΓ, the generating series of the reduced Gröbner basis Γof J.Let be the alternator ideal generated by alternators in the free magma algebra K{x,y,z}, then we obtain the elements of multidegree (2, 1, 1) in the reduced Gröbner basis Γ of w.r.t. the admissible order degree first factor on .We consider the Cayley algebra O and the admissible order degree first factor on , where X={i,j,ℓ}, with fix order i

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