List questions from perturbation-theory

Published on 12 Apr 2026 - 8:12

59

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Rules of linear perturbation theory

Published on 08 Apr 2026 - 22:57

287

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WKB (perturbation) theory

Published on 09 Apr 2026 - 21:22

441

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Asymptotic approximation for $\epsilon^2 y'' = axy$

Published on 15 Apr 2026 - 19:54

256

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Resonance in Mathieu's Equation

Published on 12 Apr 2026 - 2:03

51

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Earth gravitational potential

Published on 29 Apr 2026 - 12:54

87

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Approximate solution of algebraic equations when order is large parameter

Published on 14 Apr 2026 - 4:31

721

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perturbation method for $y' - (y-1)^2 = \epsilon \frac{y^2}{x^2}$ and $y(1) = 1$.

Published on 16 Apr 2026 - 8:20

658

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When to plug in $y = y_0 + \epsilon y_1 + \epsilon^2 y_2 +\cdots$ into the ODE to get the asymptotic series

Published on 16 Apr 2026 - 2:59

169

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Boundary layer ODE, is my solution okay?

Published on 23 Apr 2026 - 8:08

205

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Eigenvector of the sum of two skew symmetric matrices

Published on 16 Apr 2026 - 1:55

421

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Continuity of the kernel of bounded operators under perturbation

Published on 28 Apr 2026 - 1:49

282

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Perturbation Theory: Derivative of a trace.

Published on 10 Apr 2026 - 0:57

93

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Continuously Differentiably Unitarily Diagonalizing $B + tC$, for $B$, $C$ Hermitian.

Published on 14 Apr 2026 - 16:20

462

Views

Does the modulus of a linear operator change continuously with the operator?

Published on 09 Apr 2026 - 4:37

List Question

Continuously choose a basis of a continuous family of matrices

Rules of linear perturbation theory

WKB (perturbation) theory

Asymptotic approximation for $\epsilon^2 y'' = axy$

Resonance in Mathieu's Equation

Earth gravitational potential

Approximate solution of algebraic equations when order is large parameter

perturbation method for $y' - (y-1)^2 = \epsilon \frac{y^2}{x^2}$ and $y(1) = 1$.

When to plug in $y = y_0 + \epsilon y_1 + \epsilon^2 y_2 +\cdots$ into the ODE to get the asymptotic series

Boundary layer ODE, is my solution okay?

Eigenvector of the sum of two skew symmetric matrices

Continuity of the kernel of bounded operators under perturbation

Perturbation Theory: Derivative of a trace.

Continuously Differentiably Unitarily Diagonalizing $B + tC$, for $B$, $C$ Hermitian.

Does the modulus of a linear operator change continuously with the operator?

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