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StarBucK
  • Member for 5 years, 10 months
  • Last seen more than a week ago
  • Europe
11 votes
2 answers
603 views

Fock space used in Quantum mechanic : how can we have direct sum of spaces of different dimensions?

8 votes
3 answers
2k views

Push forward or differential : is there a link with the differential of a function?

5 votes
3 answers
1k views

"Smooth" tensor field

5 votes
3 answers
504 views

A nice book on representation of groups (not too theoretical, for physisicts purposes)

5 votes
2 answers
2k views

Let $G$ be a Lie group. How to prove that $G/H$ is a manifold?

4 votes
1 answer
363 views

Irreducible representations of $su2$ in dimension $d$ : how do we know it exists?

4 votes
0 answers
454 views

Peter Weyl theorem in $SU(2)$ : basis of $L_2[SU(2)]$

4 votes
1 answer
5k views

Eigenvalues of tensor product of matrices : question about general properties

3 votes
2 answers
2k views

Why is the infinite period Fourier series the Fourier transform?

3 votes
1 answer
341 views

Question about the physical intuition behind tensors

3 votes
2 answers
302 views

Pull-back of a differential : I get confused with the variables

3 votes
1 answer
374 views

Misunderstanding on maximal atlas

3 votes
1 answer
663 views

How to go from Lie Algebra representation to group representation?

3 votes
1 answer
956 views

Maximum number of irreducible representation of finite group

3 votes
1 answer
297 views

Difference of vectors living in different tangent spaces

3 votes
2 answers
130 views

Surface of revolution between two circles

2 votes
1 answer
196 views

Good and bad tensors (and the metric)

2 votes
1 answer
62 views

Let $f : M \rightarrow N$ where $M$ and $N$ are manifolds of dimension $n$ and $m$. How to prove M diffeomorph to N only if $m=n$

2 votes
0 answers
214 views

Exponentiation of a vector field

2 votes
1 answer
3k views

Haar measure and SU(2)

2 votes
2 answers
1k views

Is any representation equivalent to a unitary one?

2 votes
1 answer
700 views

A book on Lie Algebras with proofs but written for physicists

2 votes
1 answer
118 views

Vector space spanned by a non finite family of vectors

2 votes
2 answers
181 views

$C^k$ manifold : question about the definition

2 votes
0 answers
21 views

Isomorph to Lie Algebra and stability of the commutator

2 votes
0 answers
67 views

Conditionnal entropy : intuitive interpretation

2 votes
1 answer
71 views

Why do we have $\int_{t_0}^t \delta(t-t') c(t')=\frac{1}{2} c(t)$?

2 votes
0 answers
149 views

p-form and Maxwell equations

2 votes
0 answers
349 views

Why is $ds^2=dx^2+dy^2$ enough accurate for integration?

2 votes
3 answers
736 views

Transformations law for tensor: why $\partial_{\mu} A^{\nu}$ is not a well defined tensor ? Where is my mistake.