Extensions between Verma modules for dihedral groups
classification
🧮 math.RT
keywords
extensionsmodulesvermadihedralgroupsbimodulesblockcategory
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Computing the extensions between Verma modules is in general a very difficult problem. Using Soergel bimodules, one can construct a graded version of the principal block of Category $\mathcal{O}$ for any finite coxeter group. In this setting, we compute the extensions between Verma modules for dihedral groups.
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