List questions from perturbation-theory

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Eigenvector Approximation

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Quantum mechanics: First order perturbation to eigenstates

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Finding a closed formula for $\sum_{i=0}^n 2^i \cdot (n-i)$ through the perturbation method

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Second order homogenous differential equation with variable coefficients

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Matrix inverse of $A + \epsilon I$, where $A$ is invertible

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Is it possible to determine the largest number $\tau$ such that the spectral radius $\rho(A\pm \tau ee^T) < 1$

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Asymptotic expansion for roots of singular cubic equation

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Estimate of the perturbation of the spectral radius of a positive matrix

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Differentiability of largest eigenvalue for a $C^1$ function

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How can apply a perturbation method in a system of equations?

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Seeking to prove the equivalence of Perturbation series criteria

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List Question

Asymptotic for $y'' + \frac{\epsilon y'}{y^2} - y' = 0$, $y(-\infty) = 1$, $y(+\infty) = \epsilon$.

Perturbation objective and constraint together

Eigenvector Approximation

Perturbation of ODE system

Quantum mechanics: First order perturbation to eigenstates

Finding a closed formula for $\sum_{i=0}^n 2^i \cdot (n-i)$ through the perturbation method

Second order homogenous differential equation with variable coefficients

Matrix inverse of $A + \epsilon I$, where $A$ is invertible

Is it possible to determine the largest number $\tau$ such that the spectral radius $\rho(A\pm \tau ee^T) < 1$

How to determine Solution from variables in Power

Asymptotic expansion for roots of singular cubic equation

Estimate of the perturbation of the spectral radius of a positive matrix

Differentiability of largest eigenvalue for a $C^1$ function

How can apply a perturbation method in a system of equations?

Seeking to prove the equivalence of Perturbation series criteria

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