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

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Dirac operators in representation theory מאת Huang, Jing-Song

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

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

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

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

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

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

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

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