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Qing Liu's user avatar
Qing Liu's user avatar
Qing Liu
  • Member for 14 years, 2 months
  • Last seen more than 8 years ago
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View all questions and answers
answer
45
Definition and meaning of the conductor of an elliptic curve
Jan 26, 2010
answer
30
Rings in which every non-unit is a zero divisor
Oct 18, 2010
answer
30
When does the relative differential $df=0$ imply that $f$ comes from the base?
Sep 14, 2011
answer
29
Do all curves have Néron models
Oct 24, 2012
answer
29
Noether's normalization lemma over a ring A
Oct 18, 2010
answer
29
morphism closed + fibres proper => proper?
Feb 16, 2010
answer
28
Is there a connected non-affine scheme $S$ such that it is the union of rings of integers of number fields?
Sep 25, 2011
answer
26
A finitely generated $\mathbb{Z}$-algebra that is a field has to be finite
Mar 6, 2011
answer
23
Completion of modules of differentials (A strange exercise in Liu's AG textbook)
Jan 24, 2010
answer
22
Continuity in terms of lines
Nov 21, 2010