Séminaire Lotharingien de Combinatoire, B22f (1989), 10 pp.
[Formerly: Publ. I.R.M.A. Strasbourg, 1990, 414/S-22, p. 17-26.]

Luigi Cerlienco and Francesco Piras

Sulla blalgebra duale della bialgebra dei polinomi in più variabili

Abstract. This paper is devoted to the study of the dual bialgebra Bno of the bialgebra Bn ofpolynomials in finitely many variables. The elements of Bno are described in various ways in order to obtain some usefu! formulae (e.g., a formula for the "remainder" modulo a cofinite ideal of Bn). The subcoalgebra Cf generated by a given element fBno is studied and its structure constants with relation to different natural bases are given.

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