Return of x + x²y + z² + t³ = 0
classification
🧮 math.AC
math.AG
keywords
ringarbitrarycharacteristiccomputingdevelopdomainsexamplefield
read the original abstract
We develop techniques for computing the AK invariant of domains with arbitrary characteristic. As an example, we show that for any field $K$ the ring $K[X,Y,Z,T] / (X + X^2 Y + Z^2 + T^3)$ is not isomorphic to a polynomial ring over $K$.
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