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pitchounet
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  • Orsay, France
18 votes
1 answer
4k views

Exponential map on the $n$-sphere

9 votes
1 answer
801 views

Geodesics and manifold

5 votes
1 answer
247 views

Is this a geodesic?

5 votes
1 answer
886 views

Rank of a matrix over a principal ideal domain

4 votes
1 answer
113 views

Null polynomial of $f+g$ and $f \circ g$

3 votes
1 answer
752 views

Approximate parallel transport using Jacobi fields

3 votes
2 answers
808 views

Matrix equation $AX=XB$

2 votes
1 answer
231 views

Question about a Riemannian metric

2 votes
2 answers
108 views

Change of variables in $\int_{0}^{+\infty} \frac{x^{-\beta}}{1+x} \, dx$

2 votes
3 answers
150 views

Why $\int_{0}^{+\infty} \frac{\sin(x)}{x} \: dx = \int_{0}^{+\infty} \frac{\sin^{2}(x)}{x^{2}} \: dx$?

2 votes
0 answers
146 views

Momentum map and equivariance

1 vote
0 answers
221 views

Notation in riemannian geometry

1 vote
0 answers
49 views

kernel of linear application

1 vote
2 answers
83 views

Linear equation

1 vote
1 answer
59 views

Derivative of tangent vetor

1 vote
1 answer
63 views

linear algebra : matrix decomposition

1 vote
0 answers
105 views

Divisors and cyclotomic polynomials

1 vote
1 answer
485 views

Example of complete not-connected riemannian manifold

1 vote
1 answer
98 views

Can this integral be computed in closed-form?

1 vote
1 answer
270 views

Matrix differential equation of the form $X'=CX$

0 votes
1 answer
100 views

Understand a matrix expression

0 votes
1 answer
48 views

Exponential of a complex line

0 votes
1 answer
404 views

Bilinear form and random variables

0 votes
1 answer
44 views

Questions about sequences