Symplectic rational connectedness conjecture

Let XX be a smooth projective rationally connected variety. A Gromov–Witten invariant with two point insertions is an invariant of the form

[pt],[pt],A1,,An,I0,βX,\langle [pt], [pt], A_1, \ldots, A_n, I \rangle^X_{0, \beta},

where AiH(X,Q)A_i \in H^*(X,\mathbb{Q}) and, if n1n\geq 1, II is the pull-back of a cohomology class from M0,n+2\overline{M}_{0,n+2} via the forgetful map

M0,n+2(X,β)M0,n+2.\overline{M}_{0,n+2}(X,\beta)\to\overline{M}_{0,n+2}.

Symplectic rational connectedness conjecture. There is a non-zero Gromov–Witten invariant of this form. This conjecture proposes a symplectic analogue of rational connectedness, and motivates the notion of a symplectic rationally connected manifold. Its status is not resolved in the source.

Sources & referencesView supporting material

Primary source

Zhiyu Tian, “Towards the symplectic Graber-Harris-Starr theorems”, arXiv:1208.4340 (2012).

Additional references

2 papers in this index state this conjecture (2009–2012). The statement above is taken from the most recent of them; the others are arXiv:0908.4241.

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