32 research outputs found

    On calibrated representations of the degenerate affine periplectic Brauer algebra

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    We initiate the representation theory of the degenerate affine periplectic Brauer algebra on nn strands by constructing its finite-dimensional calibrated representations when n=2n=2. We show that any such representation that is indecomposable and does not factor through a representation of the degenerate affine Hecke algebra occurs as an extension of two semisimple representations with one-dimensional composition factors; and furthermore, we classify such representations with regular eigenvalues up to isomorphism

    Translation functors and decomposition numbers for the periplectic Lie superalgebra p(n)\mathfrak{p}(n)

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    We study the category Fn\mathcal{F}_n of finite-dimensional integrable representations of the periplectic Lie superalgebra p(n)\mathfrak{p}(n). We define an action of the Temperley-Lieb algebra with infinitely many generators and defining parameter 00 on the category Fn\mathcal{F}_n by translation functors. We also introduce combinatorial tools, called weight diagrams and arrow diagrams for p(n)\mathfrak{p}(n) resembling those for gl(mn)\mathfrak{gl}(m|n). Using the Temperley-Lieb algebra action and the combinatorics of weight and arrow diagrams, we then calculate the multiplicities of standard and costandard modules in indecomposable projective modules and classify the blocks of Fn\mathcal{F}_n. We also prove that indecomposable projective modules in this category are multiplicity-free

    Translation functors and decomposition numbers for the periplectic Lie superalgebra p(n)\mathfrak{p}(n)

    No full text
    We study the category Fn\mathcal{F}_n of finite-dimensional integrable representations of the periplectic Lie superalgebra p(n)\mathfrak{p}(n). We define an action of the Temperley-Lieb algebra with infinitely many generators and defining parameter 00 on the category Fn\mathcal{F}_n by translation functors. We also introduce combinatorial tools, called weight diagrams and arrow diagrams for p(n)\mathfrak{p}(n) resembling those for gl(mn)\mathfrak{gl}(m|n). Using the Temperley-Lieb algebra action and the combinatorics of weight and arrow diagrams, we then calculate the multiplicities of standard and costandard modules in indecomposable projective modules and classify the blocks of Fn\mathcal{F}_n. We also prove that indecomposable projective modules in this category are multiplicity-free

    Translation functors and decomposition numbers for the periplectic Lie superalgebra p(n)\mathfrak{p}(n)

    Get PDF
    We study the category Fn\mathcal{F}_n of finite-dimensional integrable representations of the periplectic Lie superalgebra p(n)\mathfrak{p}(n). We define an action of the Temperley-Lieb algebra with infinitely many generators and defining parameter 00 on the category Fn\mathcal{F}_n by translation functors. We also introduce combinatorial tools, called weight diagrams and arrow diagrams for p(n)\mathfrak{p}(n) resembling those for gl(mn)\mathfrak{gl}(m|n). Using the Temperley-Lieb algebra action and the combinatorics of weight and arrow diagrams, we then calculate the multiplicities of standard and costandard modules in indecomposable projective modules and classify the blocks of Fn\mathcal{F}_n. We also prove that indecomposable projective modules in this category are multiplicity-free
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