Connectedness and normality conjecture for finite-type quiver varieties

Fix a quiver of finite type, take m=(1,,1)m=(1,\dots,1) and λ=0\lambda=0, and let d,vd,v be fixed. Write Mm,0(d,v)M_{m,0}(d,v) and M0,0(d,v)M_{0,0}(d,v) for the corresponding quiver varieties. Connectedness and normality conjecture. The variety Mm,0(d,v)M_{m,0}(d,v) is connected, and the variety M0,0(d,v)M_{0,0}(d,v) is normal. This is the conjecture proposed for finite-type quiver varieties after reducing to the case vi>0v_i>0 for all vertices. The supplied text does not indicate whether it has been resolved.

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Primary source

Andrea Maffei, “A remark on quiver varieties andweyl groups”, arXiv:math/0003159 (2000).

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