On the existence of the essential spectrum for a class of differential expressions
| Argitaratua izan da: | Matimya's Matematika Vol. 22, no. 2 (May. 1999), 28 - 32 |
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| Egile nagusia: | |
| Formatua: | Artikulua |
| Hizkuntza: | English |
| Argitaratua: |
1999
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| Gaiak: |