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Ben Webster
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are deformations of torsion modules always torsion?

Let's say I have a field k and a flat family of k[t]-modules M over the disk Spec k[h].

Now, assume that M/hM is torsion as a k[t]-module (but NOT finitely generated). Can I conclude that M/(h-i)M is torsion as a k[t] module for any i in k?

Ben Webster
  • 44.7k
  • 12
  • 126
  • 260