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We explore the (noncommutative) geometry of locally simple representations of the diagonal locally finite Lie algebras sl(n1), o(n1), and sp(n1). Let g1 be one of these Lie algebras, and let I U(g1) be the nonzero annihilator of a locally simple g1-module. We show that for each such I, there is a quiver Q so that locally simple g1-modules with annihilator I are parameterised by "points" in the "noncommutative space" corresponding to the path algebra of Q. Methods of noncommutative algebraic geometry are key to this correspondence. We classify the quivers that arise and relate them to characters of symmetric groups.
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