We describe algebras of constants of the set of all partial derivations in free algebras of unitarily closed varieties over a field of characteristic 0. These constants are also called proper polynomials. It is proved that a subalgebra of proper polynomials coincides with the subalgebra generated by values of commutators and Umirbaev–Shestakov primitive elements pm,n on a set of generators for a free algebra. The space of primitive elements is a linear algebraic system over a signature Σ = {[x, y], pm,n | m, n ≥ 1}. We point out bases of operations of the set Σ in the classes of all algebras, all commutative algebras, right alternative and Jordan algebras.
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Supported by Russian Science Foundation, project No. 14-21-00065.
Supported by FAPESP (project No. 2014/09310-5) and by CNPq (project No. 303916/2014-1).
Translated from Algebra i Logika, Vol. 56, No. 3, pp. 317-347, May-June, 2017.
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Pchelintsev, S.V., Shestakov, I.P. Constants of Partial Derivations and Primitive Operations. Algebra Logic 56, 210–231 (2017). https://doi.org/10.1007/s10469-017-9441-x
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DOI: https://doi.org/10.1007/s10469-017-9441-x