Title: Presentation of critical modules of GK-dimension 2 over elliptic algebras
Abstract: We show that critical modules of Gelfand-Kirillov dimension 2 and multiplicity <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="d"> <mml:semantics> <mml:mi>d</mml:mi> <mml:annotation encoding="application/x-tex">d</mml:annotation> </mml:semantics> </mml:math> </inline-formula> over an elliptic algebra have (up to modules of lower GK-dimension and shifting) a presentation by <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="d times d"> <mml:semantics> <mml:mrow> <mml:mi>d</mml:mi> <mml:mo>×</mml:mo> <mml:mi>d</mml:mi> </mml:mrow> <mml:annotation encoding="application/x-tex">d\times d</mml:annotation> </mml:semantics> </mml:math> </inline-formula>-matrices of linear forms. In the language of non-commutative algebraic geometry this amounts to a generic description of “curves” of degree <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="d"> <mml:semantics> <mml:mi>d</mml:mi> <mml:annotation encoding="application/x-tex">d</mml:annotation> </mml:semantics> </mml:math> </inline-formula> in a projective quantum plane.