List questions from mathematical-physics

Published on 14 Apr 2026 - 7:15

21

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Examples of higher order brackets in physics

Published on 13 Apr 2026 - 2:14

175

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Trouble completing derivation using Milne-Thompson Circle Theorem with a Vortex

Published on 12 Apr 2026 - 11:34

46

Views

The Introduction of boundary conditions in physical problems: A problem with a result in a book

Published on 13 Apr 2026 - 20:04

100

Views

On the zeros of Bessel functions of parameter $\nu=-1/3$

Published on 15 Apr 2026 - 3:58

316

Views

Mechanics: Car approaching traffic lights

Published on 08 Apr 2026 - 5:05

104

Views

How to show that $T^n = A^n = A$ for an idempotent matrix $A$

Published on 13 Apr 2026 - 23:57

268

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Heat equation on a disc : method of images?

Published on 28 Mar 2026 - 15:26

146

Views

Integration by parts of the Laplacian

Published on 14 Apr 2026 - 20:12

2.5k

Views

Parity of spherical harmonics

Published on 14 Apr 2026 - 17:01

447

Views

Trace of product of two positive semi-definite matrix.

Published on 11 Apr 2026 - 19:56

144

Views

Eigenvalues and eigenvectors of tensor product of identity and transpose of a rank-$1$ matrix.

Published on 13 Apr 2026 - 12:51

49

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If $\sum_{x=1}^{|A|} |\psi_x\rangle\langle \psi_x|=I$, then $|\psi_x\rangle\langle \psi_x|$ is a basis projectoer.

Published on 14 Apr 2026 - 21:33

131

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An statement about non-negative trace and positive semi-definite operators.

Published on 09 Apr 2026 - 7:34

67

Views

Is there a generalisation of the ordinary cross product ${\vec A}\times {\vec B}$ in quantum mechanics?

Published on 14 Apr 2026 - 7:59

List Question

Shape of the common catenary

Examples of higher order brackets in physics

Trouble completing derivation using Milne-Thompson Circle Theorem with a Vortex

The Introduction of boundary conditions in physical problems: A problem with a result in a book

On the zeros of Bessel functions of parameter $\nu=-1/3$

Mechanics: Car approaching traffic lights

How to show that $T^n = A^n = A$ for an idempotent matrix $A$

Heat equation on a disc : method of images?

Integration by parts of the Laplacian

Parity of spherical harmonics

Trace of product of two positive semi-definite matrix.

Eigenvalues and eigenvectors of tensor product of identity and transpose of a rank-$1$ matrix.

If $\sum_{x=1}^{|A|} |\psi_x\rangle\langle \psi_x|=I$, then $|\psi_x\rangle\langle \psi_x|$ is a basis projectoer.

An statement about non-negative trace and positive semi-definite operators.

Is there a generalisation of the ordinary cross product ${\vec A}\times {\vec B}$ in quantum mechanics?

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