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Perturbation of Diracs equation (first order)

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#ordinary-differential-equations #perturbation-theory
195
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Perturbation solution Dirac equation

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#ordinary-differential-equations #perturbation-theory
433
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Perturbation expansion within trig function

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#ordinary-differential-equations #trigonometry #taylor-expansion #perturbation-theory
128
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Showing that $\lambda - (A + B)$ has dense range

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#functional-analysis #operator-theory #perturbation-theory #semigroup-of-operators
74
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Can we perturb a low rank map to a full rank map in a smooth way?

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#real-analysis #multivariable-calculus #matrix-rank #perturbation-theory #stability-theory
101
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Stationary Phase with controlled phase $|\int_0^Te^{\frac{i}{\epsilon}\phi_j(t)}dt| = O(\epsilon)$

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#partial-differential-equations #fourier-analysis #asymptotics #perturbation-theory #singular-integrals
206
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Solution Poisson Equation by Homotopy Perturbation Method

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#partial-differential-equations #boundary-value-problem #perturbation-theory #poissons-equation
74
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Definition of perturbation using norms

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#numerical-methods #perturbation-theory
77
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Expected value of eigenvalues of perturbed matrix

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#eigenvalues-eigenvectors #matrix-calculus #perturbation-theory #random-matrices
354
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Perturbation Methods ODE Example

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#ordinary-differential-equations #perturbation-theory
929
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Matching expansion of an ODE: $\epsilon y'' + xy' + y = 0$

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#asymptotics #perturbation-theory #boundary-layer
1.6k
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Find a two term asymptotic expansion of the following problem

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#calculus #asymptotics #perturbation-theory
493
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Can we choose smoothly the singular vectors of a matrix?

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#differential-topology #svd #perturbation-theory #orthogonal-matrices #singular-values
148
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Singular perturbation theory in non-standard form

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#ordinary-differential-equations #reference-request #stability-in-odes #perturbation-theory
791
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How do the eigenvalues change if we change the diagonal entries of the matrix?

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#linear-algebra #eigenvalues-eigenvectors #perturbation-theory #matrix-analysis #gershgorin-sets

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