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517.984 --- Spectral theory of linear operators --- Hilbert space. --- Harmonic analysis. --- Transformations on linear Hilbert spaces --- Transformations on linear Hilbert spaces. --- 517.984 Spectral theory of linear operators --- Analyse fonctionnelle --- Functional analysis --- Opérateurs linéaires --- Opérateurs linéaires
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Analytical spaces --- Banach spaces --- Sequences (Mathematics) --- Series --- Banach, Espaces de --- Suites (Mathématiques) --- Séries (Mathématiques) --- Sequence (Mathematics) --- 517.984 --- Algebra --- Mathematics --- Processes, Infinite --- Mathematical sequences --- Numerical sequences --- Functions of complex variables --- Generalized spaces --- Topology --- Spectral theory of linear operators --- 517.984 Spectral theory of linear operators --- Suites (Mathématiques) --- Séries (Mathématiques) --- Analyse fonctionnelle --- Functional analysis --- Functional analysis. --- Espaces de banach --- Suites et series
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Operator theory --- 517.984 --- Spectral theory of linear operators --- Asymptotic expansions. --- Eigenvalues. --- Fourier analysis. --- Toeplitz operators. --- 517.984 Spectral theory of linear operators --- Opérateurs linéaires --- Perturbation (mathématiques) --- Linear operators --- Perturbation (Mathematics) --- Toeplitz operators --- Eigenvalues --- Asymptotic expansions --- Fourier Analysis --- Linear operators. --- Opérateurs linéaires --- Perturbation (mathématiques) --- Theorie spectrale
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Operator theory --- Linear operators --- Spectral theory (Mathematics) --- 517.984 --- Functional analysis --- Hilbert space --- Measure theory --- Transformations (Mathematics) --- Linear maps --- Maps, Linear --- Operators, Linear --- Spectral theory of linear operators --- Linear operators. --- Spectral theory (Mathematics). --- 517.984 Spectral theory of linear operators --- Mesures spectrales (mathématiques) --- Mesures spectrales (mathématiques) --- Espaces de banach --- Operateurs lineaires --- Theorie spectrale
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517.984 --- Spectral theory of linear operators --- Differential equations, Partial. --- Pseudodifferential operators. --- 517.984 Spectral theory of linear operators --- Differential equations, Partial --- Pseudodifferential operators --- Operators, Pseudodifferential --- Pseudo-differential operators --- Operator theory --- Partial differential equations --- Équations aux dérivées partielles --- Opérateurs pseudo-différentiels --- Équations aux dérivées partielles --- Opérateurs pseudo-différentiels
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The theory of Toeplitz operators has come to resemble more and more in recent years the classical theory of pseudodifferential operators. For instance, Toeplitz operators possess a symbolic calculus analogous to the usual symbolic calculus, and by symbolic means one can construct parametrices for Toeplitz operators and create new Toeplitz operators out of old ones by functional operations.If P is a self-adjoint pseudodifferential operator on a compact manifold with an elliptic symbol that is of order greater than zero, then it has a discrete spectrum. Also, it is well known that the asymptotic behavior of its eigenvalues is closely related to the behavior of the bicharacteristic flow generated by its symbol.It is natural to ask if similar results are true for Toeplitz operators. In the course of answering this question, the authors explore in depth the analogies between Toeplitz operators and pseudodifferential operators and show that both can be viewed as the "quantized" objects associated with functions on compact contact manifolds.
Operator theory --- Toeplitz operators --- Spectral theory (Mathematics) --- 517.984 --- Spectral theory of linear operators --- Toeplitz operators. --- Spectral theory (Mathematics). --- 517.984 Spectral theory of linear operators --- Operators, Toeplitz --- Linear operators --- Functional analysis --- Hilbert space --- Measure theory --- Transformations (Mathematics) --- Algebraic variety. --- Asymptotic analysis. --- Asymptotic expansion. --- Big O notation. --- Boundary value problem. --- Change of variables. --- Chern class. --- Codimension. --- Cohomology. --- Compact group. --- Complex manifold. --- Complex vector bundle. --- Connection form. --- Contact geometry. --- Corollary. --- Cotangent bundle. --- Curvature form. --- Diffeomorphism. --- Differentiable manifold. --- Dimensional analysis. --- Discrete spectrum. --- Eigenvalues and eigenvectors. --- Elaboration. --- Elliptic operator. --- Embedding. --- Equivalence class. --- Existential quantification. --- Exterior (topology). --- Fourier integral operator. --- Fourier transform. --- Hamiltonian vector field. --- Holomorphic function. --- Homogeneous function. --- Hypoelliptic operator. --- Integer. --- Integral curve. --- Integral transform. --- Invariant subspace. --- Lagrangian (field theory). --- Lagrangian. --- Limit point. --- Line bundle. --- Linear map. --- Mathematics. --- Metaplectic group. --- Natural number. --- Normal space. --- One-form. --- Open set. --- Operator (physics). --- Oscillatory integral. --- Parallel transport. --- Parameter. --- Parametrix. --- Periodic function. --- Polynomial. --- Projection (linear algebra). --- Projective variety. --- Pseudo-differential operator. --- Q.E.D. --- Quadratic form. --- Quantity. --- Quotient ring. --- Real number. --- Scientific notation. --- Self-adjoint. --- Smoothness. --- Spectral theorem. --- Spectral theory. --- Square root. --- Submanifold. --- Summation. --- Support (mathematics). --- Symplectic geometry. --- Symplectic group. --- Symplectic manifold. --- Symplectic vector space. --- Tangent space. --- Theorem. --- Todd class. --- Toeplitz algebra. --- Toeplitz matrix. --- Toeplitz operator. --- Trace formula. --- Transversal (geometry). --- Trigonometric functions. --- Variable (mathematics). --- Vector bundle. --- Vector field. --- Vector space. --- Volume form. --- Wave front set. --- Opérateurs pseudo-différentiels
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299 G(t), and to obtain the corresponding properties of its Laplace transform (called the resolvent of - A) R(p) = (A + pl)-l , whose existence is linked with the spectrum of A. The functional space framework used will be, for simplicity, a Banach space(3). To summarise, we wish to extend definition (2) for bounded operators A, i.e. G(t) = exp( - tA) , to unbounded operators A over X, where X is now a Banach space. Plan of the Chapter We shall see in this chapter that this enterprise is possible, that it gives us in addition to what is demanded above, some supplementary information in a number of areas: - a new 'explicit' expression of the solution; - the regularity of the solution taking into account some conditions on the given data (u , u1,f etc ... ) with the notion of a strong solution; o - asymptotic properties of the solutions. In order to treat these problems we go through the following stages: in § 1, we shall study the principal properties of operators of semigroups {G(t)} acting in the space X, particularly the existence of an upper exponential bound (in t) of the norm of G(t). In §2, we shall study the functions u E X for which t --+ G(t)u is differentiable.
517.9 --- 517.5 --- 517.4 --- 51-7 --- 51-7 Mathematical studies and methods in other sciences. Scientific mathematics. Actuarial mathematics. Biometrics. Econometrics etc. --- Mathematical studies and methods in other sciences. Scientific mathematics. Actuarial mathematics. Biometrics. Econometrics etc. --- 517.4 Functional determinants. Integral transforms. Operational calculus --- Functional determinants. Integral transforms. Operational calculus --- 517.5 Theory of functions --- Theory of functions --- 517.9 Differential equations. Integral equations. Other functional equations. Finite differences. Calculus of variations. Functional analysis --- Differential equations. Integral equations. Other functional equations. Finite differences. Calculus of variations. Functional analysis --- Mathematical analysis. --- Numerical analysis. --- 517.984 --- 517.984 Spectral theory of linear operators --- Spectral theory of linear operators --- #KVIV:BB --- 519.6 --- 681.3 *G18 --- 681.3*G19 --- 681.3*G19 Integral equations: Fredholm equations; integro-differential equations; Volterra equations (Numerical analysis) --- Integral equations: Fredholm equations; integro-differential equations; Volterra equations (Numerical analysis) --- 681.3 *G18 Partial differential equations: difference methods; elliptic equations; finite element methods; hyperbolic equations; method of lines; parabolic equations (Numerical analysis) --- Partial differential equations: difference methods; elliptic equations; finite element methods; hyperbolic equations; method of lines; parabolic equations (Numerical analysis) --- 519.6 Computational mathematics. Numerical analysis. Computer programming --- Computational mathematics. Numerical analysis. Computer programming --- 519.63 --- 519.63 Numerical methods for solution of partial differential equations --- Numerical methods for solution of partial differential equations --- Mathematical analysis --- Numerical analysis --- Analyse mathématique --- Analyse numérique --- Partial differential equations. --- Partial Differential Equations. --- Numerical Analysis. --- Partial differential equations --- Chemometrics. --- Computational intelligence. --- Applied mathematics. --- Engineering mathematics. --- Mathematical physics. --- Math. Applications in Chemistry. --- Computational Intelligence. --- Mathematical and Computational Engineering. --- Theoretical, Mathematical and Computational Physics. --- Physical mathematics --- Physics --- Engineering --- Engineering analysis --- Intelligence, Computational --- Artificial intelligence --- Soft computing --- Chemistry, Analytic --- Analytical chemistry --- Chemistry --- Mathematics --- Measurement --- Statistical methods --- System theory. --- Calculus of variations. --- Systems Theory, Control. --- Calculus of Variations and Optimal Control; Optimization. --- Isoperimetrical problems --- Variations, Calculus of --- Maxima and minima --- Systems, Theory of --- Systems science --- Science --- Philosophy --- Mechanics. --- Classical Mechanics. --- Classical mechanics --- Newtonian mechanics --- Dynamics --- Quantum theory --- Analysis (Mathematics). --- Analysis. --- 517.1 Mathematical analysis
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