Cotangent spaces and separating re-embeddings

Martin Kreuzer, Le Ngoc Long, Lorenzo Robbiano

Given an affine algebra $R=P/I$, where $P=K[x_1,\dots ,x_n]$ is a polynomial ring over a field $K$ and $I$ is an ideal in $P$, we study re-embeddings of the affine scheme ${\rm Spec…