有说服力 发表于 2025-3-28 14:46:19

Let . be a closed, separable subspace of a Hilbert space ..We can define a new norm |.|. satisfying |.|. ≤∥.∥, ∀. ∈ . and such that the topology induced by this norm is equivalent to the weak topology of . on bounded subsets of .. This can be done as follows: Let {..} be an orthonormal basis for .. Define

无聊点好 发表于 2025-3-28 22:42:03

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侵害 发表于 2025-3-29 01:25:58

We now consider some applications of the materials presented in Chaps. .–.. We wish to show how powerful these methods are in obtaining results better than those given by other methods. In Chaps. 7–. we deal with some problems involving Schrödinger equations.

Parley 发表于 2025-3-29 05:41:45

Wortgeschichten aus alten Gemeinden,We consider the system . where . is a map from . =  to . such that each component ..(.) is a periodic function in .. with period ., and the function . (., .) = . (., .., ⋯ , ..) is continuous from . to . with . For each . the function . (., .) is periodic in . with period ..

inflame 发表于 2025-3-29 07:24:52

Wortgeschichten aus alten Gemeinden,Consider the problem . where . is a bounded domain whose boundary is a smooth manifold, and .(., .) is a continuous function on . The following theorem will be a corollary of the results of this chapter.

esthetician 发表于 2025-3-29 14:13:08

https://doi.org/10.1007/978-3-663-02981-6In this chapter we show how monotonicity methods combined with infinite dimensional sandwich pairs can be used to solve very general systems of equations whether or not they are semibounded.

PET-scan 发表于 2025-3-29 18:04:09

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farewell 发表于 2025-3-29 22:08:53

https://doi.org/10.1007/978-3-663-02981-6In this chapter we study periodic solutions of the Dirichlet problem for the semilinear wave equation:

和平主义 发表于 2025-3-30 02:29:48

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茁壮成长 发表于 2025-3-30 04:22:03

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