Algebraic diffeomorphism transitivity conjecture for rational surfaces

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Let XX be a smooth projective rational surface, and let nn be a natural integer. The group of algebraic diffeomorphisms Diff⁡alg(X(R))\operatorname{Diff}_{\mathrm{alg}}(X(\mathbb{R})) consists of algebraic diffeomorphisms of the real locus X(R)X(\mathbb{R}). Algebraic diffeomorphism transitivity conjecture. The group Diff⁡alg(X(R))\operatorname{Diff}_{\mathrm{alg}}(X(\mathbb{R})) acts nn-transitively on X(R)X(\mathbb{R}). The only evidence given is the case X=P1×P1X=\mathbb{P}^1\times\mathbb{P}^1, established by the preceding theorem; the conjecture is intended to provide the transitivity needed to compare rational models of nonorientable surfaces, and its general case remains open.

References

Primary source

Indranil Biswas and Johannes Huisman, “Rational real algebraic models of topological surfaces”, arXiv:math/0701402 (2007).

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