RT Journal Article T1 A representation theorem for orthogonally additive polynomials on Riesz spaces A1 Llavona, José G. A1 Ibort Latre, Luis Alberto A1 Linares Briones, Pablo AB The aim of this article is to prove a representation theorem for orthogonally additive polynomials in the spirit of the recent theorem on representation of orthogonally additive polynomials on Banach lattices but for the setting of Riesz spaces. To this purpose the notion of p-orthosymmetric multilinear form is introduced and it is shown to be equivalent to the orthogonally additive property of the corresponding polynomial. Then the space of positive orthogonally additive polynomials on an Archimedean Riesz space taking values on an uniformly complete Archimedean Riesz space is shown to be isomorphic to the space of positive linear forms on the n-power in the sense of Boulabiar and Buskes of the original Riesz space. PB Springer SN 1139-1138 YR 2012 FD 2012-01 LK https://hdl.handle.net/20.500.14352/42225 UL https://hdl.handle.net/20.500.14352/42225 LA eng NO Aliprantis, C.D., Burkinshaw, O.: Positive Operators. Springer, Berlin (2006) Benyamini, Y., Lassalle, S., Llavona, J.G.: Homogeneous orthogonally-additive polynomials on Banach lattices. Bull. Lond. Math. Soc. 38, 459–469 (2006) Boulabiar, K., Buskes, G.: Vector lattice powers: f-algebras and functional calculus. Commun. Algebra 34(4), 1435–1442 (2006) Buskes, G., Kusraev, A.G.: Representation and extension of orthoregular bilinear operators. Vladikavkaz Math. J. 9(1), 16–29 (2007) Buskes, G., van Rooij, A.: Almost f-algebras: Commutativity and the Cauchy-Schwarz inequality. Positivity and its applications. Positivity 4(3), 227–231 (2000) Buskes, G., van Rooij, A.: Squares of Riesz spaces. Rocky Mt. J. Math. 31(1), 45–56 (2001) Carando, D., Lassalle, S., Zalduendo, I.: Orthogonally additive polynomials over C(K) are measures—a short proof. Integral Equ. Oper. Theory 56(4), 597–602 (2006) Grecu, B., Ryan, R.A.: Polynomials on Banach spaces with unconditional bases. Proc. Am. Math. Soc. 133(4), 1083–1091 (2005) Ibort, A., Linares, P., Llavona, J.G.: On the representation of orthogonally additive polynomials in ℓ p . Publ. Res. Inst. Math. Sci. 45(2), 519–524 (2009) de Jonge, E., van Rooij, A.: Introduction to Riesz Spaces. Mathematical Centre Tracts, vol. 78. Mathematisch Centrum, Amsterdam (1977) Pérez García, D., Villanueva, I.: Orthogonally additive polynomials on spaces of continuous functions. J. Math. Anal. Appl. 306, 97–105 (2005) Toumi, M.A.: A decomposition theorem for orthogonally additive polynomials on Archimedean vector lattices. Private communication (2010) NO MEC DS Docta Complutense RD 19 may 2024