
We study the Lie algebra structure of the Onsager algebra from the ideal theoretic point of view. A structure theorem of ideals in the Onsager algebra is obtained with the connection to the finite-dimensional representations. We also discuss the solvable algebra aspect of the Onsager algebra through the formal Lie algebra theory.
7 pages, Latex; Contribution to the 8th Colloquium "Quantum groups and integrable systems", held at Prague, 17-19 June 1999
finite-dimensional representations, Statistical Mechanics (cond-mat.stat-mech), Infinite-dimensional groups and algebras motivated by physics, including Virasoro, Kac-Moody, \(W\)-algebras and other current algebras and their representations, Mathematics - Quantum Algebra, FOS: Mathematics, Infinite-dimensional Lie (super)algebras, Quantum Algebra (math.QA), FOS: Physical sciences, Onsager algebra, Exactly solvable models; Bethe ansatz, Condensed Matter - Statistical Mechanics
finite-dimensional representations, Statistical Mechanics (cond-mat.stat-mech), Infinite-dimensional groups and algebras motivated by physics, including Virasoro, Kac-Moody, \(W\)-algebras and other current algebras and their representations, Mathematics - Quantum Algebra, FOS: Mathematics, Infinite-dimensional Lie (super)algebras, Quantum Algebra (math.QA), FOS: Physical sciences, Onsager algebra, Exactly solvable models; Bethe ansatz, Condensed Matter - Statistical Mechanics
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