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Instead, one constructs a Chebyshev’s interpolant fN(x) from the evaluation of f(x) on points xi fN(xi) = f(xi) , i ∈{ 0, 1,

Collocation methods: Chebyshev-Lobatto grid When dealing with the product of functions, as it is the case in our setting, the description in terms of spectral coefficients ci’s is n

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Pseudospectrum and black hole quasi-normal mode (in)stability

gr-qc · 2020-04-14 · unverdicted · novelty 6.0

Pseudospectrum of Schwarzschild QNMs shows stability of the fundamental mode to infrared perturbations respecting asymptotics and instability of overtones to ultraviolet high-frequency perturbations.

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  • Pseudospectrum and black hole quasi-normal mode (in)stability gr-qc · 2020-04-14 · unverdicted · none · ref 17

    Pseudospectrum of Schwarzschild QNMs shows stability of the fundamental mode to infrared perturbations respecting asymptotics and instability of overtones to ultraviolet high-frequency perturbations.