History of tag 0CXP
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changed the statement and the proof
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2017-04-24 |
a5929e7 |
Generalize section on infinitesimal deformations
We want to use the definitions even when the base scheme is not
necessarily Noetherian.
We also removed the requirement in (RS*) that the affine schemes in
question map into an affine open of the base scheme. This is never
needed when one actually verifies a given stack has (RS*) and in
fact this more general notion is always a consequence of the
original restricted one.
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assigned tag 0CXP
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2016-11-06 |
0a3bfd5
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Tags: Added new tags
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changed the proof
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2016-11-06 |
a430d85 |
Fix small things in artin
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created statement with label lemma-algebraic-stack-RS-star in artin.tex
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2016-11-06 |
7a43b50 |
Strong formal effectiveness => openness versality
Actually not hard to prove and you only need to check on first order
thickenings.
Bhargav's example from c31011d shows that strong formal effectiveness
does not always hold. But what about strong formal effectiveness
where the thickenings are always first order (between any two, not
just between consecutive indices)? This is the only thing needed for
the argument here, so it would be nice if it was true for algebraic
stacks in general.
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