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Neron model: can number of components decrease after based change?
Suppose I have Neron model over some discrete valuation ring.
Is there a result such that the number of components of the fiber over the closed point cannot decrease after some based change?
In part …
7
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2
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1k
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Calculate reduction of Jacobian of hyperelliptic curve
Suppose I have a hyperelliptic curve of genus $2$ over $\mathbb Q$. I want to get information about its Jacobian reduction at prime $p$ (especially, in case $p=2$). Also I'm interesting in the group o …