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Bijective correspondence between $\mathbb G_a$ actions on affine varieties and exponential maps on affine $k$-domains
Let $A$ be an integral domain which is a finitely generated algebra over an algebraically closed field $k$. Let $\phi :A \to A^{[1]}$ be a $k$-algebra homomorphism and let us write $\phi_t : A \to A[...
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