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The Gauss map of a genus three theta divisor

The Gauss map of a genus three theta divisor

A smooth complex curve is determined by the Gauss map of the theta divisor of the Jacobian variety of the curve. The Gauss map is invariant with respect to the $(- 1)$-map of the Jacobian. We show that for a generic genus three curve the Gauss map is locally ${\mathbf …