User T. Stark

5 votes

1 answer

3k views

Tangent space and Jacobian

asked Jun 1, 2019 at 18:41

4 votes

1 answer

240 views

Show that the interior of manifold is open.

asked Jul 9, 2019 at 10:56

4 votes

1 answer

122 views

For a cordinate system $(U,x^1,\ldots , x^d)$ show that $[\partial / \partial x_i,\partial / \partial x_j]=0 $ on $U$.

asked Aug 4, 2019 at 23:02

4 votes

0 answers

104 views

Relation between Lie Bracket and exponetial map

asked Sep 15, 2019 at 14:52

3 votes

1 answer

170 views

A particular confusion in showing $M_m$ is naturally isomorphic with $(F_m/F_m^2)^*$

asked Jul 28, 2019 at 16:18

2 votes

1 answer

2k views

Showing the projection map is a submersion.

asked Jun 30, 2019 at 13:29

2 votes

1 answer

209 views

Are symplectic maps immersions?

asked Sep 16, 2019 at 15:16

2 votes

2 answers

143 views

Showing that two ideals are equivalent.

asked Sep 30, 2019 at 10:15

2 votes

1 answer

87 views

Homotopy of chain maps

asked Oct 7, 2019 at 17:01

2 votes

1 answer

260 views

How to view complex vector bundle as a real vector bundle

asked Sep 7, 2019 at 22:09

2 votes

1 answer

1k views

$CW$ complex structure and intuitive construction of spaces

asked Nov 1, 2019 at 21:25

1 vote

1 answer

315 views

Canonical projection to subspace is a homeomorphism?

asked Oct 22, 2019 at 17:00

1 vote

1 answer

50 views

Maximal ideal $M$ of $R[x]$ gives prime $M\cap R$ of $R$

asked Oct 11, 2019 at 19:07

1 vote

1 answer

108 views

normal form property of grobner basis

asked Oct 3, 2019 at 20:09

1 vote

1 answer

155 views

Question from H. Brezis, calculating dual norms

asked Aug 7, 2019 at 21:18

1 vote

1 answer

209 views

Moment map of $\mathbb{S}^1$ acting on $\mathbb{C}$

asked Sep 17, 2019 at 20:22

1 vote

1 answer

236 views

$\mathbb{C}P^n$ diffeomorphic to $S^{2n+1}/U(1)$

asked Sep 18, 2019 at 21:21

1 vote

1 answer

157 views

Universal property on direct sums of abelian groups, struggling with uniqueness

asked Sep 21, 2019 at 18:41

1 vote

1 answer

80 views

Exploring alternative definitons of derivatives

asked May 10, 2019 at 21:10

0 votes

2 answers

1k views

A set $A$ is nowhere dense if and only if every non-empty open set has a non-emtpy open subset disjoint from $\overline{A}$

asked May 23, 2019 at 20:31

0 votes

1 answer

140 views

Tangent spaces that are not simply $\mathbb{R}^n$.

asked May 31, 2019 at 11:20

0 votes

1 answer

851 views

Zero dimensional compact manifold is finite

asked Jun 12, 2019 at 10:43

0 votes

1 answer

365 views

Confusion about equivalence of continuity and boundedness of linear operators.

asked Jul 27, 2019 at 20:32

0 votes

2 answers

721 views

The space of bounded linear operators into a banach space is complete

asked Jul 28, 2019 at 12:59

0 votes

2 answers

157 views

Determining an $\mathbb{R}$-basis for $\mathbb{R}[x,y]/(x^2-x,y^2-y)$.

asked Sep 23, 2019 at 17:49

0 votes

0 answers

33 views

Regular values of a complex map

asked Sep 18, 2019 at 19:15

0 votes

1 answer

655 views

Ideal generated by a finite set of points

asked Sep 7, 2019 at 11:12

0 votes

1 answer

80 views

uniqueness of chain map for direct sum of

asked Sep 16, 2019 at 20:40

0 votes

0 answers

28 views

Elements in relative homology [duplicate]

asked Oct 15, 2019 at 11:17

Stack Exchange Network

29 Questions

Tangent space and Jacobian

Show that the interior of manifold is open.

For a cordinate system $(U,x^1,\ldots , x^d)$ show that $[\partial / \partial x_i,\partial / \partial x_j]=0 $ on $U$.

Relation between Lie Bracket and exponetial map

A particular confusion in showing $M_m$ is naturally isomorphic with $(F_m/F_m^2)^*$

Showing the projection map is a submersion.

Are symplectic maps immersions?

Showing that two ideals are equivalent.

Homotopy of chain maps

How to view complex vector bundle as a real vector bundle

$CW$ complex structure and intuitive construction of spaces

Canonical projection to subspace is a homeomorphism?

Maximal ideal $M$ of $R[x]$ gives prime $M\cap R$ of $R$

normal form property of grobner basis

Question from H. Brezis, calculating dual norms

Moment map of $\mathbb{S}^1$ acting on $\mathbb{C}$

$\mathbb{C}P^n$ diffeomorphic to $S^{2n+1}/U(1)$

Universal property on direct sums of abelian groups, struggling with uniqueness

Exploring alternative definitons of derivatives

A set $A$ is nowhere dense if and only if every non-empty open set has a non-emtpy open subset disjoint from $\overline{A}$

Tangent spaces that are not simply $\mathbb{R}^n$.

Zero dimensional compact manifold is finite

Confusion about equivalence of continuity and boundedness of linear operators.

The space of bounded linear operators into a banach space is complete

Determining an $\mathbb{R}$-basis for $\mathbb{R}[x,y]/(x^2-x,y^2-y)$.

Regular values of a complex map

Ideal generated by a finite set of points

uniqueness of chain map for direct sum of

Elements in relative homology [duplicate]