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21 votes
3 answers
2k views

How to appreciate Riemannian geometry

12 votes
1 answer
417 views

Intuition in some definitions and equations in Riemannian geometry

12 votes
1 answer
877 views

Integral and measures on manifolds

9 votes
1 answer
525 views

Introduction to von Neumann algebras

9 votes
1 answer
2k views

Commutator of laplacian and covariant derivative of a tensor

9 votes
2 answers
2k views

Intuitive meaning of immersions

7 votes
0 answers
124 views

Different equations for mean curvature flow

6 votes
1 answer
616 views

Free probability: motivation for Voiculescu's free gaussian functor

6 votes
1 answer
299 views

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

5 votes
1 answer
861 views

Lower bound of the injectivity radius

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?

4 votes
1 answer
102 views

Smooth homotopy of proper maps

4 votes
0 answers
121 views

Uniform convergence of integrals over a parameter

4 votes
0 answers
227 views

Is the image of Borel measurable function essentially Borel measurable?

4 votes
1 answer
255 views

Compactness argument for type I singularities of the mean curvature flow

4 votes
3 answers
749 views

Definition of weak time derivative

3 votes
1 answer
455 views

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

3 votes
1 answer
384 views

Notation of multiple covariant derivatives of a tensor

3 votes
1 answer
297 views

Huisken's monotonicity formula

2 votes
0 answers
73 views

Borel measurable function defined on level sets

2 votes
1 answer
1k views

Definition of the hyperplane bundle in algebraic geometry

2 votes
1 answer
413 views

Divergence formula on manifolds using a physical approach

2 votes
1 answer
215 views

Local isomorphism question in logics

2 votes
1 answer
967 views

Integral of a weak derivative

1 vote
0 answers
68 views

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

1 vote
1 answer
624 views

Intuition of de rham cohomology

1 vote
0 answers
175 views

Motivation for the Huisken monotonicity formula

1 vote
0 answers
52 views

Injectivity of maps in a free product group with amalgamation

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.

0 votes
2 answers
136 views

Is the dimension of an immersed manifold unique?