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arxiv: 0905.1231 · v5 · pith:VQSSQP5Pnew · submitted 2009-05-08 · 🧮 math.AG · math.RT

Tilting on non-commutative rational projective curves

classification 🧮 math.AG math.RT
keywords projectivecategoryderivedboundedcoherentrationalsheavestilting
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In this article we introduce a new class of non-commutative projective curves and show that in certain cases the derived category of coherent sheaves on them has a tilting complex. In particular, we prove that the right bounded derived category of coherent sheaves on a reduced rational projective curve with only nodes and cusps as singularities, can be fully faithfully embedded into the right bounded derived category of the finite dimensional representations of a certain finite dimensional algebra of global dimension two. As an application of our approach we show the dimension of the bounded derived category of coherent sheaves on a rational projective curve with only nodal or cuspidal singularities is at most two. In the case of the Kodaira cycles of projective lines, the corresponding tilted algebras belong to a well-known class of gentle algebras. We work out in details the tilting equivalence in the case of the plane nodal cubic.

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