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Quadratic Interpolation and Rayleigh–Ritz Methods for Bifurcation Coefficients
In this article we study the estimation of bifurcation coefficients in nonlinear branching problems by means of Rayleigh–Ritz approximation to the eigenvectors of the corresponding linearized problem. It is essential that the approximations converge in a norm of sufficient strength to render the nonlinearities continuous. Quadratic interpolation between Hilbert spaces …