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15
Math.TechQA.Club
2013-05-31 13:40:11
1.2k
Views
Morphism of finite type between affine schemes is quasi-projective
Published on
31 May 2013 - 13:40
#algebraic-geometry
#schemes
1.2k
Views
Toric Varieties: gluing of affine varieties (blow-up example)
Published on
25 Mar 2026 - 9:53
#abstract-algebra
#algebraic-geometry
#schemes
#simplicial-stuff
#toric-geometry
242
Views
A particular closed subscheme
Published on
27 Mar 2026 - 10:16
#algebraic-geometry
#schemes
#sheaf-theory
#affine-schemes
715
Views
Quasicoherent ideal sheaves on open subschemes
Published on
26 Mar 2026 - 6:34
#algebraic-geometry
#schemes
#quasicoherent-sheaves
385
Views
'$R$-rational points,' where $R$ is an arbitrary ring
Published on
27 Mar 2026 - 10:07
#algebraic-geometry
#schemes
#affine-schemes
595
Views
Why are projective spaces over a ring of different dimensions non-isomorphic?
Published on
25 Mar 2026 - 18:55
#algebraic-geometry
#schemes
#projective-schemes
2.2k
Views
When is the image of a closed point closed under a morphism between schemes?
Published on
19 Jun 2013 - 11:21
#algebraic-geometry
#schemes
334
Views
Why are projective schemes $\mathbb P_A^n$ over a ring not affine for $n>1$?
Published on
25 Mar 2026 - 18:55
#schemes
#projective-schemes
441
Views
Is the product of non-separated schemes non-separated?
Published on
19 Jun 2013 - 16:57
#algebraic-geometry
#schemes
2.4k
Views
Scheme over S and morphisms
Published on
19 Jun 2013 - 19:31
#algebraic-geometry
#schemes
1.3k
Views
Why is the category of coherent sheaves not grothendieck?
Published on
04 Apr 2026 - 1:21
#algebraic-geometry
#category-theory
#schemes
#sheaf-theory
376
Views
Why is this composition of scheme morphisms proper?
Published on
22 Jun 2013 - 21:24
#schemes
#abstract-algebra
2.9k
Views
For a morphism of affine schemes, the inverse of an open affine subscheme is affine
Published on
27 Mar 2026 - 10:12
#schemes
#abstract-algebra
#affine-schemes
885
Views
Stalk map on fiber products of schemes
Published on
04 Apr 2026 - 1:26
#algebraic-geometry
#schemes
#sheaf-theory
898
Views
Flat closed immersion into a Noetherian scheme is open
Published on
27 Mar 2026 - 10:07
#algebraic-geometry
#commutative-algebra
#ring-theory
#schemes
#affine-schemes
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