Ordinary differential operators حسب Wang, Aiping 1977-, Zettl, Anton

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Dirac operators in representation theory حسب Huang, Jing-Song

On the existence of the essential spectrum for a class of differential expressions having normal maximal extensions حسب Castillo, Maritina T.

Perturbations of a class of ordinary differential expressions preserving the essential spectrum and the nullities حسب Victoria, Marie Redina L. Mumpar

On the existence of the essential spectrum for a class of differential expressions حسب Castillo, Maritina T.

Invariance theory, the heat equation, and the Atiyah-Singer index theorem حسب Gilkey, Peter B.

Invariance theory, the heat equations and the atiyah-singer index theorem. حسب Gilkey, Peter B.

Spectral theory and wave operators for the Schrndinger equation حسب Berthier, A. M.

Generalized functions and fourier analysis, an introduction حسب Challifour, John L.

On differential operators of infinite order حسب Steen, Pleun van der