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Answers
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26
morphism closed + fibres proper => proper?
24
Definition and meaning of the conductor of an elliptic curve
24
Is there a connected non-affine scheme $S$ such that it is the union of rings of integers of number fields?
23
When does the relative differential $df=0$ imply that $f$ comes from the base?
22
Continuity in terms of lines
20
Completion of modules of differentials (A strange exercise in Liu’s AG textbook)
17
Rings in which every non-unit is a zero divisor
17
Do all curves have Néron models
15
Can we always find a curve which doesn’t have semi-stable reduction
15
Definition of Chow groups over Spec Z
14
When is Br(X) = H^2(X,G_m)?
12
Picard group of reducible varieties
11
One point in the post of Terence Tao on Ax-Grothendieck theorem
11
Example of inclusion which is not a finite morphism
11
reduction of elliptic curves
10
When two k-varieties with the same underlying topological spaces isomorphic?
10
Restricting finite morphism to finite etale morphim
10
When is an irreducible scheme quasi-compact?
9
Noether’s normalization lemma over a ring A
9
Does Zariski’s Main Theorem come with a canonical factorization? (2)
9
Descent of closed subschemes over finite fields
9
Are there Néron models over higher dimensional base schemes?
9
Is the mapping from a scheme to its global sections a closed map?
9
Simply connected quasi-projective varieties in positive characteristic
9
Genus computation
8
Good reduction and blow-ups
8
From function field to curve: non-algebraically closed ground field and functor of points
8
Methods of showing a map has integral or good reduction
8
Immerse an affine schemes into $A^n_S$
8
Degree of $[K:K^p]$ and Completion
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