Examples of non-finitely generated Cox rings
classification
🧮 math.AG
math.AC
keywords
examplesgeneratedringstoricblownbringfinitelyhigher
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We bring examples of toric varieties blown up at a point in the torus that do not have finitely generated Cox rings. These examples are generalizations of previous work where toric surfaces of Picard number 1 were studied. In this article we consider toric varieties of higher Picard number and higher dimension. In particular, we bring examples of weighted projective 3-spaces blown up at a point that do not have finitely generated Cox rings.
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