The super-Jacobian conjecture for affine superspaces

From papers

Let F\mathbb{F} be either R\mathbb{R} or an algebraically closed field of characteristic 00, and consider the morphism ϕ\phi of the affine superspace Amn\mathbb{A}^{m|n} over F\mathbb{F} introduced above. Write its even coordinate functions as fif_i and its odd coordinate functions as qkq_k, and let J\mathbf{J} denote the ideal appearing in the super-Jacobian condition. If

Jac(fixj)F×+J,\mathsf{Jac}\left(\frac{\partial f_i}{\partial x_j}\right)\in \mathbb{F}^{\times}+\mathbf{J},

and

Jac(qkξl)F×+J,\mathsf{Jac}\left(\frac{\partial q_k}{\partial \xi_l}\right)\in \mathbb{F}^{\times}+\mathbf{J},

then ϕ\phi is an automorphism. This is the proposed super version of the Jacobian conjecture; the paper verifies it under an additional preservation hypothesis on the set of maximal Z2\mathbb{Z}_2-homogeneous ideals, but the general assertion remains unresolved.

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Sources & referencesView supporting material

Primary source

Bin Shu, “On automorphisms of affine superspaces”, arXiv:2410.07008 (2024).

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