100

Answers
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3
A Nisnevich cover which is not Zariski
1
A left adjoint for the evaluation functor \Gamma(, U)
5
‘Ampleness’ of a big line bundle
21
Clean Proofs of Properties of Projective Space
3
Can cones (toric monoids) be built as colimits of their faces?
3
Bertini theorems for base-point-free linear systems in positive characteristics
15
Finite, Étale Morphism Of Varieties
2
Weighted blow up of a Toric Variety
8
Schemes do not form a stack in the etale topology?
4
When can a finite map be blown up to a flat one?
13
Maps to projective space determined by a line bundle (2)
1
Is $\mathbb{A}²$ the universal smooth scheme which is a finite cover of $\mathbb{A}²/μ₂$?
5
Is an affine “G-variety” with reductive stabilizers a toric variety?
0
Is being a coequalizer a target-local property in schemes? (answered: no, and no)
2
Are GIT’s good categorical quotients just locally ringed space coequalizers?
4
If a representation has enough reductive stabilizers, is it a direct sum of characters?
4
Affine morphisms in different settings coincide?
6
Classification of fat projective lines?
8
The etale site of a closed subscheme and its etale Grothendieck subtopology
4
Finite groups generated by pseudo-reflections
3
When can cohomology be calculated on the coarse moduli space?
10
Continuous bijective way of representing a line on a plane [answered]
5
If a map restricts to an isomorphism on a closed subscheme and its open complement, must it be an isomorphism?
2
Generalize the Proj construction?
0
When does the global sections of a prescheme X over an other S equals those of S?n
2
Equivalence of definitions of cartesian morphisms
4
Walking around Santa Cruz, track around the soccer field
37
Math puzzles for dinner
9
Ways of formulating homological algebra without diagram chasing
1
How do I see LaTeX math on any web page and in email?
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