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Feb
27
answered isotropic sublattice
Nov
26
answered A basic theorem on field isomorphisms
Nov
22
answered Is every complex (smooth) manifold a scheme?
Aug
1
asked Interesting type of examples of affine varieties by 'forgetting' polynomial information
Dec
11
answered Is the intersection of two quasi-compact open subsets of a scheme quasi-compact?
Dec
10
answered Find a normal extension over $\mathbb{Q}$ of degree 3
Dec
8
answered non-symmetric positive definite matrix!?
Dec
2
answered Are rings with the same finite cardinality isomorphic?
Nov
29
answered Associated points of a scheme are contained in an open subset
Nov
25
answered Schemes covered by finitely-many affine open subsets
Nov
21
answered How to show that a form on $\mathbb{C}$ defines a holomorphic $1$-form on $\mathbb{C}/\Gamma$?
Nov
21
asked Closed points of a scheme correspond to maximal ideals in the affines?
Nov
17
answered Are all projection maps in a categorical product epic?
Nov
17
answered Binary notation in Magma
Nov
15
answered Vakil's Foundations of Algebraic Geometry, Exercise 5.5.E
Nov
15
asked Reading circle in mathematics?
Oct
20
asked Was there a culture/number system with negative numbers but without zero?
Oct
19
asked Is there an extensive 'cheat sheet' for general topology questions?
Oct
1
asked An 'easy' way to prove that epimorphism of sheaves implies surjectivity on stalks
Sep
25
answered proof of chinese remainder theorem for ring