Existence and truncation properties of twisted jet spaces

Let X\mathcal{X} be a Deligne–Mumford stack of finite type over DD, and let JX\mathcal{J}_{\infty}\mathcal{X} be its moduli space of twisted arcs. For nZ0n\in\mathbb{Z}_{\ge0}, a twisted nn-jet is the corresponding finite-level truncation of a twisted arc. Twisted-jet conjecture. For each nZ0n\in\mathbb{Z}_{\ge0}, there exists a moduli space JnX\mathcal{J}_n\mathcal{X} of twisted nn-jets such that, if X=[M/G]\mathcal{X}=[M/G], then JnX=JnGM\mathcal{J}_n\mathcal{X}=J_n^GM, and there are truncation maps Jn+1XJnX\mathcal{J}_{n+1}\mathcal{X}\to\mathcal{J}_n\mathcal{X} making JX\mathcal{J}_{\infty}\mathcal{X} the projective limit of the JnX\mathcal{J}_n\mathcal{X}. This would extend the familiar jet-space tower to Deligne–Mumford stacks, but the existence and stated compatibility are conjectural here.

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Primary source

Takehiko Yasuda, “Toward motivic integration over wild Deligne-Mumford stacks”, arXiv:1302.2982 (2015).

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