Gene Freudenburg

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math.AG2025

Presentations, embeddings and automorphisms of homogeneous spaces for SL(2,C)

Gene Freudenburg

For an algebraically closed field $k$ of characteristic zero and a linear algebraic $k$ -group $G$ , it is well known that every affine $G$ -variety admits a $G$ -equivariant closed em…

math.AG2024

A note on smooth $S L_{2}$ -surfaces

Gene Freudenburg

Working over a field $k$ of characteristic zero, we study the ring $R = D^{Z_{2}}$ where $D = k [x_{0}, x_{1}, x_{2}] / (2 x_{0} x_{2} - x_{1}^{2} - 1)$ and $\mathbb{Z}_…

Presentations, embeddings and automorphisms of homogeneous spaces for SL(2,C)

A note on smooth SL2​-surfaces

A note on smooth $S L_{2}$ -surfaces