Question

Pullback of a pencil on a smooth surface with irreducible fibers is injective

score 44 · Answer 1 · 2026-03-27 02:07:12

44

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Pullback of a pencil on a smooth surface with irreducible fibers is injective

Published on 27 Mar 2026 - 2:07

score 170 · Answer 2 · 2026-03-26 10:59:38

170

Views

Image of a projective variety under a morphism

Published on 26 Mar 2026 - 10:59

score 91 · Answer 3 · 2021-03-09 10:43:54

91

Views

morphism between two princial bundle over the same mainfold?

Published on 09 Mar 2021 - 10:43

score 255 · Answer 4 · 2021-03-12 16:27:15

255

Views

Morphism of topoi - the canonical topology

Published on 12 Mar 2021 - 16:27

score 69 · Answer 5 · 2021-04-01 01:51:31

69

Views

Are there $f: A\rightarrow B$ and $g: B\rightarrow A$ but $g\circ f$ is not identity?

Published on 01 Apr 2021 - 1:51

score 77 · Answer 6 · 2026-03-27 09:53:15

77

Views

Relation between epi and mono in a category

Published on 27 Mar 2026 - 9:53

score 409 · Answer 7 · 2021-04-07 17:56:33

409

Views

Difference between order isomorphism and order homomorphism

Published on 07 Apr 2021 - 17:56

score 152 · Answer 8 · 2021-04-07 19:03:41

152

Views

Show that an order-isomorphism is necessarily a bijective mapping but the converse is not true.

Published on 07 Apr 2021 - 19:03

score 48 · Answer 9 · 2021-04-07 20:41:17

48

Views

why this condition implies uniqueness

Published on 07 Apr 2021 - 20:41

score 270 · Answer 10 · 2021-04-08 00:05:17

270

Views

Understanding Hartshorne's example II 3.2.2

Published on 08 Apr 2021 - 0:05

score 51 · Answer 11 · 2021-04-15 19:22:43

51

Views

Sketches, the realized sketch and a model

Published on 15 Apr 2021 - 19:22

score 49 · Answer 12 · 2026-02-23 06:36:11

49

Views

Arrow category $\cal K^\to$

Published on 23 Feb 2026 - 6:36

score 20 · Answer 13 · 2021-05-15 17:22:19

20

Views

If $f: A \to B$ is a morphism with $f(I) \subset J \trianglelefteq B$, then there is $\tilde{f}: I/I^2 \to J/J^2$.

Published on 15 May 2021 - 17:22

score 135 · Answer 14 · 2026-02-23 13:44:34

135

Views

Proof of Theorem 6.1(b) in Silverman's AEC

Published on 23 Feb 2026 - 13:44

score 79 · Answer 15 · 2021-05-23 12:16:46

79

Views

isomorphisms are exactly the morphisms that take colimit cocones to colimit cocones

Published on 23 May 2021 - 12:16

List Question

Pullback of a pencil on a smooth surface with irreducible fibers is injective

Image of a projective variety under a morphism

morphism between two princial bundle over the same mainfold?

Morphism of topoi - the canonical topology

Are there $f: A\rightarrow B$ and $g: B\rightarrow A$ but $g\circ f$ is not identity?

Relation between epi and mono in a category

Difference between order isomorphism and order homomorphism

Show that an order-isomorphism is necessarily a bijective mapping but the converse is not true.

why this condition implies uniqueness

Understanding Hartshorne's example II 3.2.2

Sketches, the realized sketch and a model

Arrow category $\cal K^\to$

If $f: A \to B$ is a morphism with $f(I) \subset J \trianglelefteq B$, then there is $\tilde{f}: I/I^2 \to J/J^2$.

Proof of Theorem 6.1(b) in Silverman's AEC

isomorphisms are exactly the morphisms that take colimit cocones to colimit cocones

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