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Rigorous text book on algebraic topology

answered Sep 4, 2016 at 20:51

8 votes

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Implications of the difference between $\sigma$ algebra and topology?

answered Oct 11, 2017 at 9:13

7 votes

Submersion with compact level sets is a fiber bundle

answered May 7, 2019 at 17:06

5 votes

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In a topos, is the category of internal $R$-modules abelian for $R$ commutative and unitary?

answered Sep 29, 2016 at 18:57

5 votes

When are polynomial maps open or closed?

answered Jun 11, 2019 at 20:57

4 votes

Basic property of schemes?

answered May 29, 2019 at 17:26

4 votes

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Confusion with immersions, embeddings, local homeomorphisms, and local diffeomorphisms.

answered Dec 29, 2017 at 1:10

4 votes

Product of connected spaces

answered Feb 13, 2019 at 9:48

3 votes

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Wiki on exact sequences in regular categories

answered Nov 27, 2015 at 9:28

3 votes

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Some questions about synthetic differential geometry

answered Feb 26, 2016 at 10:16

3 votes

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The canonical base point for Weil algebras

answered May 7, 2016 at 12:26

3 votes

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Condition for polynomials to be proper

answered Jun 11, 2019 at 7:19

3 votes

Relation between localization and colimit.

answered May 1, 2020 at 19:59

2 votes

Books with "project"-like questions

answered Jun 15, 2019 at 12:37

2 votes

Why is the localization at a prime ideal a local ring?

answered Oct 1, 2021 at 13:50

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What's the relationship between Matrix Space and Inner Product Space

answered Oct 18, 2018 at 11:55

2 votes

Localization with respect to a multiplicative set containing zero divisors

answered May 6, 2020 at 15:34

2 votes

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Lawvere - Conceptual Mathematics - Criterion for decomposition of a map into two pieces

answered Jun 14, 2019 at 17:00

2 votes

Spaces with function definition in G. Kempf, Algebraic Varieties

answered Feb 9, 2020 at 22:17

2 votes

Definition of inner product required for linear independence?

answered Aug 17, 2016 at 23:22

2 votes

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difficulty in formulation

answered Apr 9, 2016 at 18:08

2 votes

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In an abelian category, every map $f:B \to C$ factors as $B \xrightarrow{e} \text{im}(f) \xrightarrow{m} C$

answered Dec 23, 2015 at 0:50

2 votes

restriction of scalars, reference or suggestion for proof

answered Oct 28, 2018 at 12:09

2 votes

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Is a local homeomorphism with homeomorphic fibers a covering map?

answered Oct 17, 2017 at 16:43

2 votes

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How can we have "distance" without "order" in complex numbers?

answered Oct 31, 2017 at 21:46

1 vote

Open, closed, or neither

answered Nov 26, 2017 at 10:39

1 vote

Smooth curves on a path connected smooth manifold

answered Jan 11, 2018 at 17:03

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Multi-pullbacks and the relative chinese remainder theorem

answered Dec 5, 2015 at 11:46

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What is the use of locally connected spaces?

answered May 29, 2016 at 20:59

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Is there an accepted definition of coprimality in commutative ring theory?

answered Aug 23, 2016 at 13:27

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74 Answers

Rigorous text book on algebraic topology

Implications of the difference between $\sigma$ algebra and topology?

Submersion with compact level sets is a fiber bundle

In a topos, is the category of internal $R$-modules abelian for $R$ commutative and unitary?

When are polynomial maps open or closed?

Basic property of schemes?

Confusion with immersions, embeddings, local homeomorphisms, and local diffeomorphisms.

Product of connected spaces

Wiki on exact sequences in regular categories

Some questions about synthetic differential geometry

The canonical base point for Weil algebras

Condition for polynomials to be proper

Relation between localization and colimit.

Books with "project"-like questions

Why is the localization at a prime ideal a local ring?

What's the relationship between Matrix Space and Inner Product Space

Localization with respect to a multiplicative set containing zero divisors

Lawvere - Conceptual Mathematics - Criterion for decomposition of a map into two pieces

Spaces with function definition in G. Kempf, Algebraic Varieties

Definition of inner product required for linear independence?

difficulty in formulation

In an abelian category, every map $f:B \to C$ factors as $B \xrightarrow{e} \text{im}(f) \xrightarrow{m} C$

restriction of scalars, reference or suggestion for proof

Is a local homeomorphism with homeomorphic fibers a covering map?

How can we have "distance" without "order" in complex numbers?

Open, closed, or neither

Smooth curves on a path connected smooth manifold

Multi-pullbacks and the relative chinese remainder theorem

What is the use of locally connected spaces?

Is there an accepted definition of coprimality in commutative ring theory?