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

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Dirac operators in representation theory od Huang, Jing-Song

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

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

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

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

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

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

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

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