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1. |
Record Nr. |
UNISA996466474703316 |
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Autore |
Livsic Moshe S |
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Titolo |
Commuting Nonselfadjoint Operators in Hilbert Space [[electronic resource] ] : Two Independent Studies / / by Moshe S. Livsic, Leonid L. Waksman |
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Pubbl/distr/stampa |
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Berlin, Heidelberg : , : Springer Berlin Heidelberg : , : Imprint : Springer, , 1987 |
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ISBN |
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Edizione |
[1st ed. 1987.] |
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Descrizione fisica |
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1 online resource (VI, 118 p.) |
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Collana |
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Lecture Notes in Mathematics, , 0075-8434 ; ; 1272 |
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Disciplina |
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Soggetti |
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Mathematical analysis |
Analysis (Mathematics) |
Analysis |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Bibliographic Level Mode of Issuance: Monograph |
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Sommario/riassunto |
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Classification of commuting non-selfadjoint operators is one of the most challenging problems in operator theory even in the finite-dimensional case. The spectral analysis of dissipative operators has led to a series of deep results in the framework of unitary dilations and characteristic operator functions. It has turned out that the theory has to be based on analytic functions on algebraic manifolds and not on functions of several independent variables as was previously believed. This follows from the generalized Cayley-Hamilton Theorem, due to M.S.Livsic: "Two commuting operators with finite dimensional imaginary parts are connected in the generic case, by a certain algebraic equation whose degree does not exceed the dimension of the sum of the ranges of imaginary parts." Such investigations have been carried out in two directions. One of them, presented by L.L.Waksman, is related to semigroups of projections of multiplication operators on Riemann surfaces. Another direction, which is presented here by M.S.Livsic is based on operator colligations and collective motions of systems. Every given wave equation can be obtained as an external manifestation of collective motions. The algebraic equation mentioned above is the |
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corresponding dispersion law of the input-output waves. |
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2. |
Record Nr. |
UNINA9910524852303321 |
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Autore |
Leopold Werner F. <1896-1984.> |
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Titolo |
Leopold's Bibliography of Child Language / Revised and augmented by Dan Isaac Slobin |
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Pubbl/distr/stampa |
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Indiana University Press, 1972 |
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Bloomington : , : Indiana University Press, , 1972 |
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©1972 |
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ISBN |
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Descrizione fisica |
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1 online resource (1 online resource xviii, 202 pages) |
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Collana |
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Indiana University studies in the history and theory of linguistics |
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Altri autori (Persone) |
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Soggetti |
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Kindersprache |
Bibliografie |
Children - Language |
Enfants - Langage |
Bibliographies. |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Sommario/riassunto |
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Leopold's original bibliography of 1952 was considered to deal with a rather esoteric branch of psycholinguistics. Since then, however, an explosion of research in the field has occurred, which this new revision accurately reflects. To a judicious selection from the old work Mr. Slobin has added 763 new items, standardizing the reference format and adding a unique computerized concordance. Leopold's Bibliography of Child Language is an invaluable reference work in child language study. |
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