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Über die wesentliche Maximalität gleichmäßig stark elliptischer Operatoren in $$L^ 2(R^ n)$$. (German) Zbl 0159.40201

##### Keywords:
partial differential equations
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##### References:
 [1] Agmon, S.: Lectures on elliptic boundary value problems. Princeton, N.J.: Van Nostrand matematical studies 1965. [2] Browder, F. E.: On the spectral theory of elliptic differential operators I. Math. Ann.142, 22-130 (1961). · Zbl 0104.07502 [3] Smirnow, W. I.: Lehrgang der höheren Mathematik, Teil V. Berlin: Deutscher Verlag der Wissenschaften 1962.
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