Question

If $R_P$ is reduced, is there a Zariski basic open set $D(f)$ containing $P$ such that $R_f$ is also reduced?

score 67 · Answer 1 · 2026-04-15 21:59:49

67

Views

If $R_P$ is reduced, is there a Zariski basic open set $D(f)$ containing $P$ such that $R_f$ is also reduced?

Published on 15 Apr 2026 - 21:59

score 117 · Answer 2 · 2026-04-11 15:08:16

117

Views

What does the vertex/focus/directrix of a conic correspond to in projective space?

Published on 11 Apr 2026 - 15:08

score 315 · Answer 3 · 2026-04-12 00:50:06

315

Views

Extension of scalars for a $k$-scheme

Published on 12 Apr 2026 - 0:50

score 569 · Answer 4 · 2026-04-12 09:39:30

569

Views

The "reduction to the affine case" trick [Scheme theory]

Published on 12 Apr 2026 - 9:39

score 50 · Answer 5 · 2026-04-14 01:45:41

50

Views

Group law for projective Edwards curves

Published on 14 Apr 2026 - 1:45

score 61 · Answer 6 · 2026-04-15 08:15:11

61

Views

Fibers of projection homemorphic to affine line $\mathbb{A}_{k(s)}^1$

Published on 15 Apr 2026 - 8:15

score 56 · Answer 7 · 2026-04-15 21:06:17

56

Views

The tautological line bundle $\mathcal{O}(-1)$of $\mathbb{P}^n$

Published on 15 Apr 2026 - 21:06

score 48 · Answer 8 · 2026-04-11 18:25:45

48

Views

Homogeneous prime ideals over finite fields

Published on 11 Apr 2026 - 18:25

score 194 · Answer 9 · 2026-04-10 10:06:15

194

Views

Question about equvialent definitions of quasi-separated scheme

Published on 10 Apr 2026 - 10:06

score 113 · Answer 10 · 2026-04-15 08:43:21

113

Views

$D$ a divisor numerically 1-connected implies that $H^0(\mathcal{O}_D)$=constants

Published on 15 Apr 2026 - 8:43

score 192 · Answer 11 · 2026-03-25 16:03:39

192

Views

Inducing one point closed subset with a closed subscheme structure so that the stalk of the subscheme is a field

Published on 25 Mar 2026 - 16:03

score 87 · Answer 12 · 2026-04-17 08:58:03

87

Views

Continuity of the "logarithm" $u \mapsto \frac{du}{udx}$ on function fields

Published on 17 Apr 2026 - 8:58

score 247 · Answer 13 · 2026-04-15 23:15:57

247

Views

Stalk of the product or power of quasi-coherent ideal sheaves

Published on 15 Apr 2026 - 23:15

score 508 · Answer 14 · 2026-04-11 18:19:11

508

Views

locally noetherian scheme with integral local rings is disjoint union of integral schemes.

Published on 11 Apr 2026 - 18:19

score 256 · Answer 15 · 2026-04-10 13:26:21

256

Views

Proof of Tannaka duality after Deligne

Published on 10 Apr 2026 - 13:26

List Question

If $R_P$ is reduced, is there a Zariski basic open set $D(f)$ containing $P$ such that $R_f$ is also reduced?

What does the vertex/focus/directrix of a conic correspond to in projective space?

Extension of scalars for a $k$-scheme

The "reduction to the affine case" trick [Scheme theory]

Group law for projective Edwards curves

Fibers of projection homemorphic to affine line $\mathbb{A}_{k(s)}^1$

The tautological line bundle $\mathcal{O}(-1)$of $\mathbb{P}^n$

Homogeneous prime ideals over finite fields

Question about equvialent definitions of quasi-separated scheme

$D$ a divisor numerically 1-connected implies that $H^0(\mathcal{O}_D)$=constants

Inducing one point closed subset with a closed subscheme structure so that the stalk of the subscheme is a field

Continuity of the "logarithm" $u \mapsto \frac{du}{udx}$ on function fields

Stalk of the product or power of quasi-coherent ideal sheaves

locally noetherian scheme with integral local rings is disjoint union of integral schemes.

Proof of Tannaka duality after Deligne

Trending Questions

Popular # Hahtags

Popular Questions