18

Answers
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1
Constructible topology on schemes
1
What is the definition of “canonical” ?
4
Galois action on special fiber of a stable model
1
Explicit equation of Dickson invariant / quasideterminant / special orthogonal group over the integers
2
Top cohomology detecting compactness
2
Polynomials for addition in the Witt vectors
0
Local rings of non-closed points
2
functions satisfying “one-one iff onto”
3
universal categorical quotient
2
Finiteness of étale Cohomology Groups
2
Valuation Criterion of Properness, (Irreducible) Varieties
4
Is the category of affine fppf groups closed under normal quotients?
3
Is a flat, locally finite type morphism open?
1
Criterion for open morphisms without constructible sets?
10
Widely accepted mathematical results that were later shown wrong?
6
When is the push-forward of the structure sheaf locally free
3
Tannaka formalism and the étale fundamental group
4
Z_p flatness and irreducible components.