Abstract
We consider a reflexive module of rank one over a degenerate Weyl algebra over a field of positive characteristic. We define an invariant which we call wrinkle of the module and see that it is good enough to distinguish trivial module.
Citation
Yoshifumi Tsuchimoto. "Norm based extension of reflexive modules over Weyl algebras." Tohoku Math. J. (2) 64 (1) 61 - 77, 2012. https://doi.org/10.2748/tmj/1332767340
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