The completion of the `t`-chart at a non-rational point `(t, Φ(x/t))` is isomorphic to the child surface over `O[θ] = O[X]/(Φ)`, compatibly with the chart substitution, and the image of `θ` is the Hen

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The completion of the `t`-chart at a non-rational point `(t, Φ(x/t))` is isomorphic to the child surface over `O[θ] = O[X]/(Φ)`, compatibly with the chart substitution, and the image of `θ` is the Hen · Prove2Me