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Uniqueness of universal dimensions and configurations of points and lines

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arxiv 2101.10860 v3 pith:OWNY3OXV submitted 2021-01-22 math.QA hep-thmath-phmath.GRmath.MPmath.RT

classification math.QAhep-thmath-phmath.GRmath.MPmath.RT
keywords universalpointsconfigurationconfigurationsdimensiondimensionsformulafunctions
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abstract

The problem of uniqueness of universal formulae for (quantum) dimensions of simple Lie algebras is investigated. We present generic functions, which multiplied by a universal (quantum) dimension formula, preserve both its structure and its values at the points from Vogel's table. Connection of some of these functions with geometrical configurations, such as the famous Pappus-Brianchon-Pascal $(9_3)_1$ configuration of points and lines, is established. Particularly, the appropriate realizable configuration $(144_336_{12})$ (yet to be found) will provide a symmetric non-uniqueness factor for any universal dimension formula.

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  1. Vogel's universality and Macdonald dimensions

    hep-th 2025-07 conditional novelty 4.0 of 10

    The paper gives a single rational formula for adjoint Macdonald dimensions that unifies the simply laced Lie algebras A_n, D_n, E6, E7, E8, plus explicit mixed-root-system dimension formulas.

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