Motivic symplectic cohomology detects smoothly but not symplectically isotopic symplectomorphisms

Let XX be a symplectic manifold, and let g0,g1:XXg_0,g_1:X\rightarrow X be symplectomorphisms. The maps (g0)(g_0)_* and (g1)(g_1)_* are induced on the groups SHM(Y,X)SH_{\bullet}^M(Y,X) associated with suitable symplectic manifolds YY and MM. Detection conjecture. If g0g_0 and g1g_1 are smoothly isotopic but not symplectically isotopic, then there exist symplectic manifolds YY and MM such that

(g0)(g1).(g_0)_*\neq (g_1)_*.

This would provide a way to detect the failure of symplectic isotopy using the motivic symplectic groups. The source states that the problem is still open and that these groups are not yet sufficiently computable for systematic comparisons.

Sources & referencesView supporting material

Primary source

Vardan Oganesyan, “The first step towards symplectic homotopy theory”, arXiv:2304.10529 (2024).

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