User abcdef

21 votes

3 answers

2k views

How to appreciate Riemannian geometry

asked May 12, 2017 at 12:01

12 votes

1 answer

417 views

Intuition in some definitions and equations in Riemannian geometry

geometry differential-geometry riemannian-geometry intuition motivation

asked Apr 3, 2017 at 13:22

12 votes

1 answer

877 views

Integral and measures on manifolds

measure-theory differential-geometry reference-request hausdorff-measure

asked Feb 7, 2018 at 14:09

9 votes

1 answer

525 views

Introduction to von Neumann algebras

functional-analysis c-star-algebras von-neumann-algebras

asked Sep 5, 2018 at 13:47

9 votes

1 answer

2k views

Commutator of laplacian and covariant derivative of a tensor

differential-geometry riemannian-geometry tensors

asked Oct 14, 2017 at 12:53

9 votes

2 answers

2k views

Intuitive meaning of immersions

differential-geometry differential-topology

asked Mar 31, 2015 at 17:29

7 votes

0 answers

124 views

Different equations for mean curvature flow

differential-geometry riemannian-geometry mean-curvature-flows

asked Jan 2, 2018 at 23:08

6 votes

1 answer

616 views

Free probability: motivation for Voiculescu's free gaussian functor

operator-theory operator-algebras c-star-algebras von-neumann-algebras random-matrices

asked May 28, 2019 at 16:45

6 votes

1 answer

299 views

Curve embedding in $\mathbb{P}^3$ - role of divisors

algebraic-geometry algebraic-curves projective-space divisors-algebraic-geometry

asked Jun 24, 2017 at 20:54

5 votes

1 answer

861 views

Lower bound of the injectivity radius

differential-geometry riemannian-geometry

asked Mar 21, 2018 at 21:15

4 votes

1 answer

37 views

Is the group of elements $t \in \mathbb{R}$ such that $A +t = A$ up to measure $0$ closed?

real-analysis measure-theory lebesgue-measure group-actions

asked May 5, 2019 at 14:03

4 votes

1 answer

102 views

Smooth homotopy of proper maps

general-topology differential-geometry differential-topology homotopy-theory

asked Apr 30, 2018 at 8:22

4 votes

0 answers

121 views

Uniform convergence of integrals over a parameter

real-analysis sequences-and-series analysis measure-theory convergence-divergence

asked May 1, 2018 at 22:37

4 votes

0 answers

227 views

Is the image of Borel measurable function essentially Borel measurable?

real-analysis measure-theory descriptive-set-theory measurable-functions borel-sets

asked May 15, 2020 at 8:05

4 votes

1 answer

255 views

Compactness argument for type I singularities of the mean curvature flow

differential-geometry partial-differential-equations riemannian-geometry parabolic-pde mean-curvature-flows

asked Nov 1, 2017 at 19:11

4 votes

3 answers

749 views

Definition of weak time derivative

functional-analysis partial-differential-equations sobolev-spaces weak-derivatives bochner-spaces

asked Mar 28, 2016 at 17:58

3 votes

1 answer

455 views

Example of a curve embedding in $\mathbb{P}^3$.

algebraic-geometry algebraic-curves projective-space

asked Jun 24, 2017 at 15:56

3 votes

1 answer

384 views

Notation of multiple covariant derivatives of a tensor

differential-geometry riemannian-geometry tensors

asked Oct 13, 2017 at 8:43

3 votes

1 answer

297 views

Huisken's monotonicity formula

differential-geometry riemannian-geometry geometric-measure-theory mean-curvature-flows

asked Apr 18, 2018 at 20:59

2 votes

0 answers

73 views

Borel measurable function defined on level sets

real-analysis measure-theory descriptive-set-theory measurable-functions borel-sets

asked May 15, 2020 at 7:03

2 votes

1 answer

1k views

Definition of the hyperplane bundle in algebraic geometry

algebraic-geometry algebraic-curves vector-bundles projective-space

asked Jun 27, 2017 at 8:33

2 votes

1 answer

413 views

Divergence formula on manifolds using a physical approach

manifolds riemannian-geometry intuition divergence-operator motivation

asked Sep 27, 2017 at 9:05

2 votes

1 answer

215 views

Local isomorphism question in logics

logic model-theory first-order-logic

asked Aug 7, 2015 at 22:44

2 votes

1 answer

967 views

Integral of a weak derivative

functional-analysis partial-differential-equations sobolev-spaces weak-derivatives bochner-spaces

asked Apr 3, 2016 at 18:39

1 vote

0 answers

68 views

Alternative proof : Group algebra contains all irreducible G-modules.

abstract-algebra group-theory modules representation-theory alternative-proof

asked Jun 11, 2016 at 13:28

1 vote

1 answer

624 views

Intuition of de rham cohomology

differential-geometry manifolds homology-cohomology smooth-manifolds differential-forms

asked Jan 5, 2017 at 8:10

1 vote

0 answers

175 views

Motivation for the Huisken monotonicity formula

differential-geometry partial-differential-equations riemannian-geometry parabolic-pde mean-curvature-flows

asked Oct 6, 2017 at 13:20

1 vote

0 answers

52 views

Injectivity of maps in a free product group with amalgamation

abstract-algebra group-theory category-theory free-product

asked Mar 7 at 11:57

0 votes

0 answers

223 views

If $G$ is finitely generated with $\mathcal{Z}(G)$ finite, $N \triangleleft G$ finite, then $\mathcal{Z}(G/N)$ is finite.

group-theory reference-request finite-groups finitely-generated quotient-group

asked Dec 10, 2021 at 12:03

0 votes

2 answers

136 views

Is the dimension of an immersed manifold unique?

differential-geometry manifolds smooth-manifolds

asked Feb 7, 2018 at 12:35

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32 Questions

How to appreciate Riemannian geometry

Intuition in some definitions and equations in Riemannian geometry

Integral and measures on manifolds

Introduction to von Neumann algebras

Commutator of laplacian and covariant derivative of a tensor

Intuitive meaning of immersions

Different equations for mean curvature flow

Free probability: motivation for Voiculescu's free gaussian functor

Curve embedding in $\mathbb{P}^3$ - role of divisors

Lower bound of the injectivity radius

Is the group of elements $t \in \mathbb{R}$ such that $A +t = A$ up to measure $0$ closed?

Smooth homotopy of proper maps

Uniform convergence of integrals over a parameter

Is the image of Borel measurable function essentially Borel measurable?

Compactness argument for type I singularities of the mean curvature flow

Definition of weak time derivative

Example of a curve embedding in $\mathbb{P}^3$.

Notation of multiple covariant derivatives of a tensor

Huisken's monotonicity formula

Borel measurable function defined on level sets

Definition of the hyperplane bundle in algebraic geometry

Divergence formula on manifolds using a physical approach

Local isomorphism question in logics

Integral of a weak derivative

Alternative proof : Group algebra contains all irreducible G-modules.

Intuition of de rham cohomology

Motivation for the Huisken monotonicity formula

Injectivity of maps in a free product group with amalgamation

If $G$ is finitely generated with $\mathcal{Z}(G)$ finite, $N \triangleleft G$ finite, then $\mathcal{Z}(G/N)$ is finite.

Is the dimension of an immersed manifold unique?