Semi-invariants of quivers and their zero sets
Grzegorz BobińskiNicolaus Copernicus University, Torun, Poland
Christine RiedtmannUniversität Bern, Switzerland
Andrzej SkowrońskiNicolaus Copernicus University, Torun, Poland
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We survey old and new results on semi-invariant polynomial functions on affine varieties of quivers with respect to conjugate actions of products of general linear groups over an algebraically closed field and the geometry of the sets of common zeros of the nonconstant semi-invariants.