
The author roughly considers the class of finitely ramified fractals. Assume that such a fractal \(K\) carries a fractal Laplacian \(\Delta\) with a domain \({\mathcal D}_\mu\subset C(K) \subset L^2(K,\mu)\), where \(\mu\) is a finite Borel measure with support \(K\). The so-called post critical set is a natural boundary of \(K\). Under Dirichlet boundary conditions an eigenfunction of \(\Delta\) is called localized if its support is contained in the interior of \(K\). The classical Laplacian on a ball of \(\mathbb{R}^d\) does not have such eigenfunctions but many connected fractals do. The eigenvalue counting function \(\rho(\lambda)\) of \(\Delta\) is decomposed into the sum of a function \(\rho^W(\lambda)\) counting the eigenvalues of localized eigenfunctions and \(\rho^F(\lambda)\) counting the global ones. For \(\lambda \to \infty\) it is shown that \(\rho^W(\lambda)\) asymptotically equals \(\lambda^{d_S/2}\), where \(d_S\) is the spectral dimension of \(K\). On the other hand, some fractals have the asymptotic \(\rho^F(\lambda) \approx \lambda^\beta\) for some \(0<\beta
Probabilistic potential theory, post critical set, Fractals, Laplace operator, Asymptotic distributions of eigenvalues in context of PDEs, finitely ramified fractals, localized eigenfunction, eigenvalue counting function, fractal Laplacian, Analysis
Probabilistic potential theory, post critical set, Fractals, Laplace operator, Asymptotic distributions of eigenvalues in context of PDEs, finitely ramified fractals, localized eigenfunction, eigenvalue counting function, fractal Laplacian, Analysis
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