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Viac informácií o knihe Progress in Inverse Spectral Geometry

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most polynomial growth on every half-space Re (z) ::::: c. Moreover, Op(t) depends holomorphically on t for Re t O. General references for much of the material on the derivation of spectral functions, asymptotic expansions and analytic properties of spectral functions are [A-P-S] and [Sh], especially Chapter 2. To study the spectral functions and their relation to the geometry and topology of X, one could, for example, take the natural associated parabolic problem as a starting point. That is, consider the 'heat equation': (%t + p) u(x, t) = 0 { u(x,O) = Uo(x), tP which is solved by means of the (heat) semi group V(t) = e- ; namely, u(·, t) = V(t)uoU· Assuming that V(t) is of trace class (which is guaranteed, for instance, if P has a positive principal symbol), it has a Schwartz kernel K E COO(X x X x Rt,E ®E), locally given by 00 K(x,y; t) = L-IAk(~k ® 'Pk)(X,y), k=O for a complete set of orthonormal eigensections 'Pk E COO(E). Taking the trace, we then obtain: 00 tA Op(t) = trace(V(t)) = 2::- k. k=O Now, using, e. g. , the Dunford calculus formula (where C is a suitable curve around a(P)) as a starting point and the standard for malism of pseudodifferential operators, one easily derives asymptotic expansions for the spectral functions, in this case for Op.

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Zaradenie knihy Knihy po anglicky Mathematics & science Mathematics Geometry

• Celý názov: Progress in Inverse Spectral Geometry
• Autor: Stig I. Andersson
• Jazyk: Angličtina
• Väzba: Pevná
• Počet strán: 197
• EAN: 9783764357559
• ISBN: 376435755X
• ID: 04334449
• Nakladateľ: Birkhauser Verlag AG
• Hmotnosť: 1050 g
• Rozmery: 235 × 155 × 23 mm
• Dátum vydania: 01. October 1997

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