Fourteenth Schoo l o n Operator s in Functiona l Space s Spectral Theor y of Operator s Recent Titles in This Series 149 V . S. Afraimovich, e t al., Thirtee n Paper s i n Algebra , Functiona l Analysis , Topology , an d Probability, Translate d fro m th e Russia n 148 A . D. Aleksandrov, O . V. Belegradek, L . A. Bokut', an d Yu. L . Ershov, Editors , First Siberia n Winte r Schoo l in Algebra and Analysi s 147 I . G. Bashmakova, et al., Nin e Paper s from th e Internationa l Congres s of Mathematician s 1986 146 L . A. Aizenberg, et al., Fiftee n Paper s in Complex Analysi s 145 S . G. Dalalyan, et al., Eigh t Papers Translated fro m th e Russia n 144 S . D. Berman, et al., Thirtee n Paper s Translated fro m th e Russia n 143 V . A. Belonogov, et al., Eigh t Papers Translated fro m th e Russia n 142 M . B. Abalovich, et al., Te n Papers Translated fro m th e Russia n 141 Kh . Drashkovicheva , et al., Ordere d Set s and Lattice s 140 V . I. Bernik, et al., Eleve n Papers Translated fro m th e Russia n 139 A . Ya. Aizenshtat , et al., Ninetee n Paper s on Algebraic Semigroup s 138 I . V. Kovalishina and V. P. Potapov, Seve n Papers Translated fro m th e Russia n 137 V . I. Arnold, et al., Fourtee n Paper s Translated fro m th e Russia n 136 L . A. Aksent'ev, et al., Fourtee n Paper s Translated fro m th e Russia n 135 S . N. Artemov, et al., Si x Papers in Logic 134 A . Ya. Aizenshtat , et al., Fourtee n Paper s Translated fro m th e Russia n 133 R . R. Suncheleev, et al., Thirtee n Paper s in Analysis 132 I . G. Dmitriev, et al., Thirtee n Paper s in Algebra 131 V . A. Zmorovich, et al., Te n Papers in Analysis 130 M . M. Lavrent'ev, et al., One-dimensiona l Invers e Problems of Mathematical Physic s 129 S . Ya . Khavinson ; translate d b y D . Khavinson , Tw o Paper s o n Extrema l Problem s i n Complex Analysis 128 I . K. Zhuk, et al., Thirtee n Paper s in Algebra and Number Theor y 127 P . L. Shabalin, et al., Eleve n Papers in Analysis 126 S . A. Akhmedov, et al., Eleve n Papers on Differential Equation s 125 D . V. Anosov, et al., Seve n Papers in Applied Mathematic s 124 B . P. Allakhverdiev, et al., Fiftee n Paper s on Functional Analysi s 123 V . G. Maz'ya, e t al., Ellipti c Boundary Valu e Problems 122 N . U. Arakelyan, et al., Te n Papers on Complex Analysi s 121 D . L. Johnson, Th e Kourovka Notebook: Unsolve d Problem s in Group Theor y 120 M . G. Krein and V. A. Jakubovic, Fou r Paper s on Ordinary Differentia l Equation s 119 V . A. Dem'janenko, et al., Twelv e Papers in Algebra 118 Ju . V . Egorov, et al., Sixtee n Papers on Differential Equation s 117 S . V . Bockarev , e t al. , Eigh t Lecture s Delivere d a t th e Internationa l Congres s o f Mathematicians i n Helsinki, 1 97 8 116 A . G. Kusnirenko, A. B. Katok, and V. M. Alekseev, Thre e Papers on Dynamical System s 115 I . S. Belov, et al., Twelv e Papers in Analysis 114 M . S . Birma n an d M . Z . Solomjak , Quantitativ e Analysi s i n Sobole v Imbeddin g Theorems and Applications to Spectra l Theory 113 A . F. Lavrik, Twelv e Papers in Logic and Algebra 112 D . A. Gudkov and G. A. Utkin, Nin e Papers on Hilbert's 1 6t h Problem 111 V . M. Adamjan, et al., Nin e Papers on Analysis 110 M . S. Budjanu, et al., Nin e Papers on Analysis (Continued in the back of this publication) http://dx.doi.org/10.1090/trans2/150 American Mathematica l Societ y TRANSLATIONS Series 2 • Volum e 1 5 0 Soviet Regional Conference s F o u r t e e n t h Schoo l o n Operator s in Functiona l S p a c e s Spectral Theor y of Operator s Novgorod State Pedagogica l Institut e 1989 S. G . Gindiki n Editor Translation edite d by SIMEON IVANO V 1991 Mathematics Subject Classification. Primar y 34L20 , 34L25 , 34L30 , 34L40 , 47A1 3 , 47A40, 47H12; Secondary 58C40 . Library o f Congres s Cataloging-in-Publication Dat a School on Operators in Functional Spaces (14th: 1 989 : Novgorod State Pedagogical Institute) Spectral theor y o f operators : proceeding s o f th e Fourteent h Schoo l o n Operator s i n Functional Spaces , Novgorod Stat e Pedagogical Institute , 1 989/edito r S . G. Gindikin . p. cm. - (America n Mathematical Societ y translations, ISSN 0065-9290; ser. 2, v. 1 50 . Soviet regional conferences ) Translated fro m Russian . Includes bibliographical references . ISBN 0-821 8-7500- 0 1. Differential operators—Congresses . 2 . Spectral theory (Mathematics)—Congresses . I. Gindikin , S . G . (Seme n Grigor'evich ) II . Title . III . Series : America n Mathematica l Society translations; ser. 2, v. 1 50 . IV . Series: American Mathematical Societ y translations. Soviet regional conferences . QA3.A572 ser . 2 , vol. 1 5 0 [QA329.4] 510s-dc20 9 -4 69 9 [515'.7242] CI P COPYING AN D REPRINTING . Individua l reader s o f thi s publication , an d nonprofi t libraries actin g fo r them , ar e permitte d t o mak e fai r us e o f th e material , suc h a s t o cop y a n article fo r us e in teachin g o r research. Permissio n i s granted t o quot e brief passage s fro m thi s publication i n reviews, provided th e customary acknowledgmen t o f the source is given. Republication, systemati c copying , o r multipl e reproductio n o f an y materia l i n thi s pub lication (includin g abstracts ) i s permitted onl y under licens e fro m th e American Mathematica l Society. Request s for such permission should be addressed to the Manager of Editorial Services, American Mathematica l Society , P.O. Box 6248, Providence, Rhode Island 02940-6248 . The appearance of the code on the first page of an article in this book indicates the copyright owner's consent for copying beyond that permitted by Sections 1 0 7 or 1 0 8 of the U.S. Copyright Law, provide d tha t th e fe e o f $1 .0 0 plu s $.2 5 pe r pag e fo r eac h cop y b e pai d directl y t o th e Copyright Clearance Center, Inc., 27 Congress Street, Salem, Massachusetts 01970. This consent does not extend to other kinds of copying, such as copying for general distribution, for advertising or promotional purposes , for creatin g new collective works, or for resale . Copyright ©1 99 2 b y the American Mathematica l Society . Al l rights reserved. Printed i n the United State s of America . The American Mathematica l Societ y retains all rights except those granted t o the United State s Government . The paper used i n this book is acid-free an d fall s within th e guideline s established t o ensure permanence an d durability . @ This publication wa s typeset usin g A^S-T^K, the American Mathematica l Society' s TgX macro system . 10 9 8 7 6 5 4 3 2 1 9 7 96 95 94 93 92 Contents M. S. Birman and M. Z. Solomyak, Schrodinger operator. Estimate s fo r number o f bound state s a s function-theoretical 1 proble m D. G. Vasil'ev and Yu. G. Safarov, The asymptotic distribution o f eigenvalues of differentia l operator s 5 5 Yu. V. Egorov and V. A. Kondrat'ev, Estimates of the negative spectru m of a n ellipti c operator 1 Yu. A. Kuperin and S. P. Merkur'ev, Selfadjoin t extension s an d scatter ing theory 1 fo r several-bod y system s 4 1 V This page intentionally left blank Recent Titles in This Series (Continued from the front of this publication) 109 D . V . Anosov , e t al. , Twent y Lecture s Delivere d a t th e Internationa l Congres s o f Mathematicians i n Vancouver, 1 97 4 108 Ja . L . Geronimus and Gabor Szego, Tw o Papers on Special Function s 107 A . P. Misina and L. A. Skornjakov, Abelia n Group s and Module s 106 M . Ja. Antonovskii , V. G. Boltjanskii, an d T. A. Sarymsakoy, Topologica l Semifield s an d Their Applications to General Topolog y 105 R . A . Aleksandrjan , e t al. , Partia l Differentia l Equations , Proceeding s o f a Symposiu m Dedicated t o Academician S . L. Sobolev 104 L . V. Ahlfors, et al., Som e Problems o n Mathematics an d Mechanics , On the Occasion o f the Seventieth Birthda y o f Academician M . A. Lavrent'ev 103 M . S. Brodskii, et al., Nin e Papers in Analysis 102 M . S. Budjanu, et al., Te n Papers in Analysis 101 B . M. Levitan, V. A. Marcenko, and B. L. Rozdestvenskii, Si x Papers in Analysis 100 G . S. Ceitin, et al., Fourtee n Paper s on Logic, Geometry, Topolog y and Algebra 99 G . S. Ceitin, et al., Fiv e Papers on Logic and Foundation s 98 G . S. Ceitin, et al., Fiv e Papers on Logic and Foundation s 97 B . M. Budak, et al., Eleve n Papers on Logic, Algebra, Analysis and Topolog y 96 N . D. Filippov, et al., Te n Papers on Algebra and Functiona l Analysi s 95 V . M. Adamjan, et al., Eleve n Papers in Analysis 94 V . A. Baranskii, et al., Sixtee n Papers on Logic and Algebra 93 Ju . M . Berezanskii, et al., Nin e Papers on Functional Analysi s 92 A . M. Ancikov, et al., Seventee n Paper s on Topology and Differentia l Geometr y 91 L . I. Barklon, et al., Eightee n Paper s on Analysis and Quantu m Mechanic s 90 Z . S. Agranovic, et al., Thirtee n Paper s on Functional Analysi s 89 V . M. Alekseev, et al., Thirtee n Paper s on Differential Equation s 88 1 .1 . Eremin, et al., Twelv e Papers on Real and Complex Functio n Theor y 87 M . A . Aizerman , e t al. , Sixtee n Paper s o n Differentia l an d Differenc e Equations , Functional Analysis, Games and Contro l 86 N . I. Ahiezer, e t al., Fiftee n Paper s o n Rea l an d Comple x Functions,* * Series, Differentia l and Integral Equation s 85 V . T. Fomenko, et al., Twelv e Papers on Functional Analysi s and Geometr y 84 S . N. Cernikov, et al., Twelv e Papers on Algebra, Algebraic Geometry an d Topolog y 83 I . S. Arson, et al., Eightee n Paper s on Logic and Theory o f Function s 82 A . P. Birjukov, et al., Sixtee n Papers on Number Theory an d Algebr a 81 K . K . Golovkin , V . P . II 7 in, an d V . A . Solonnikov , Fou r Paper s o n Function s o f Rea l Variables 80 V . S. Azarin, et al., Thirtee n Paper s on Functions of Real and Comple x Variable s 79 V . I. Arnol'd, et al., Thirtee n Paper s on Functional Analysi s and Differential Equation s 78 A . V. Arhangel'skii, et al., Eleve n Papers on Topolog y 77 L . A. Balasov, et al., Fourtee n Paper s on Series and Approximatio n 76 Gen g Ji, et al., Thirtee n Paper s on Algebra and Analysi s 75 A . A. Andronov, et al., Seve n Papers on Equation s Relate d t o Mechanics and Hea t 74 B . F. Bylov, et al., Te n Papers on Analysi s 73 V . P. Kompaniec, et al., Fourtee n Paper s on Algebra, Topology, Algebraic and Differentia l Geometry 72 S . A. Akopjan, et al., Fiftee n Paper s on Analysis (See the AMS catalogue fo r earlie r titles ) This page intentionally left blank
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