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

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Dirac operators in representation theory af Huang, Jing-Song

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

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

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

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

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

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

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

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