New PDF release: Several Complex Variables V: Complex Analysis in Partial

By G. M. Khenkin

This quantity of the Encyclopaedia comprises 3 contributions within the box of advanced research. the themes handled are suggest periodicity and convolution equations, Yang-Mills fields and the Radon-Penrose remodel, and string idea. The latter have robust hyperlinks with quantum box conception and the idea of normal relativity. in reality, the mathematical effects defined within the booklet arose from the necessity of physicists to discover a valid mathematical foundation for his or her theories. The authors current their fabric within the kind of surveys which offer updated money owed of present study. The e-book might be immensely necessary to graduate scholars and researchers in complicated research, differential geometry, quantum box conception, string thought and common relativity.

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Extra resources for Several Complex Variables V: Complex Analysis in Partial Differential Equations and Mathematical Physics

Example text

N > 2. In 1960, Ehrenpreis explicitly pointed out the relation between Hartog theorem and the theory of overdetermined systems of partial equations (Ehrenpreis [1961b]). Th’ is 1‘d ea was further developed for convolution equations in the spaces E(R),D’(R), &,,,(a) by Meril and Struppa (Meril and Struppa [1987b]; Struppa [1988b]), and for infinite-order differential equations in 23(a) (hyperfunctions) by Kawai and Struppa (Kawai and Struppa [1990]). For the details, the interested reader is referred to the fairly complete survey (Struppa [lSSSa]>.

A pair of open sets (fir,&) in IR? &) = dist(sing supp(@ * v),lR”\Rr) for any v E E’(G); (ii) for every compact K1 c 01, there exists a compact Kz E Rz such that sing supp(v) c K2 if v E &‘(a,) and sing supp(fi * V) C KI. The relevance of these definitions lies in the following theorem, whose proof combines the division theorems of Chap. 1 with the duality theory for Frechet spaces (and limits of the same). 9. 11). Then p * 2Y(fls) = 2)‘(Rr) if and only if/~ is invertible and the pair (01, i-22) is p-convex for supports and for singular supports.

Kaneko’s work also provides generalization of Hartogs’ theorem on the removability of compact singularities for holomorphic functions. 3. 7) can be reduced to the theorems in complex analysis which we discussedin Chap. A. C. Struppa 32 (actually, in view of the simplified version of the Fundamental Principle which we are proving, a very simple form of the results of Chap. 1 is needed). ) such that P(D)f = 0. LE E’(R”), one has where tP(D) is the transpose of P(D) and acts from E’(IR”) to E’(IRn).

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