List questions from mathematical-physics

Published on 06 Jun 2020 - 11:38

349

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Why do we define TQFTs as functors to vector spaces instead of Hilbert spaces?

Published on 29 Mar 2026 - 11:46

75

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If $\oint \vec D \cdot d\vec a = 0$ everywhere then $\vec D = \vec 0$?

Published on 06 Jun 2020 - 21:44

118

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Example of a Schrödinger operator with compactly supported potential and no zero eigenvalue

Published on 30 Mar 2026 - 3:35

56

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Doppler effect and the mathematics involved?

Published on 08 Jun 2020 - 17:21

146

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Why is the trace of a hermitian matrix raised to an even power greater than or equal to 0?

Published on 26 Mar 2026 - 1:17

135

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Euler-Lagrange-type equation for a more natural variational problem

Published on 30 Mar 2026 - 7:06

356

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The moment of inertia of a rigid hemisphere about diameter of a base is (a) $Ma^2/5$ (b) $Ma^2/2$ (c) $2Ma^2/5$ (d) More information needed

Published on 28 Mar 2026 - 12:15

37

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Integrating unitary vector in calculating stress resultant

Published on 23 Feb 2026 - 3:47

67

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Different equations for average velocity

Published on 14 Jun 2020 - 19:57

48

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Substituting Functions into Taylor Series

Published on 26 Mar 2026 - 22:51

587

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Inner product on Fock spaces

Published on 16 Jun 2020 - 15:06

92

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CAR on fermionic Fock spaces

Published on 25 Mar 2026 - 11:12

27

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Approximating $\int_{-\infty}^\infty e^{-f(q)/\hbar} dq$

Published on 25 Mar 2026 - 6:08

92

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Plane wave solutions to the Dirac Lagrangian

Published on 25 Mar 2026 - 15:58

List Question

How to expand $(D_\mu \phi)^\dagger$

Why do we define TQFTs as functors to vector spaces instead of Hilbert spaces?

If $\oint \vec D \cdot d\vec a = 0$ everywhere then $\vec D = \vec 0$?

Example of a Schrödinger operator with compactly supported potential and no zero eigenvalue

Doppler effect and the mathematics involved?

Why is the trace of a hermitian matrix raised to an even power greater than or equal to 0?

Euler-Lagrange-type equation for a more natural variational problem

The moment of inertia of a rigid hemisphere about diameter of a base is (a) $Ma^2/5$ (b) $Ma^2/2$ (c) $2Ma^2/5$ (d) More information needed

Integrating unitary vector in calculating stress resultant

Different equations for average velocity

Substituting Functions into Taylor Series

Inner product on Fock spaces

CAR on fermionic Fock spaces

Approximating $\int_{-\infty}^\infty e^{-f(q)/\hbar} dq$

Plane wave solutions to the Dirac Lagrangian

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