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1 online resource (378 pages) 

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Series 
Annals of Mathematics Studies ; v.167 

Annals of Mathematics Studies

Note 
Contents  Introduction  Chapter 1. Elliptic RiemannRochGrothendieck and flat vector bundles  1.1 The Clifford algebra  1.2 The standard Hodge theory  1.3 The LeviCivita superconnection  1.4 Superconnections and Poincaré duality  1.5 A group action  1.6 The Lefschetz formula  1.7 The RiemannRochGrothendieck theorem  1.8 The elliptic analytic torsion forms  1.9 The Chern analytic torsion forms  1.10 Analytic torsion forms and Poincaré duality  1.11 The secondary classes for two metrics  1.12 Determinant bundle and RaySinger metric  Chapter 2. The hypoelliptic Laplacian on the cotangent bundle  2.1 A deformation of Hodge theory  2.2 The hypoelliptic Weitzenböck formulas  2.3 Hypoelliptic Laplacian and standard Laplacian  2.4 A deformation of Hodge theory in families  2.5 Weitzenböck formulas for the curvature  2.6 [omitted][sup(M)][sub(Φb,±HbωH)], [omitted][sup(M,2)][sub(Φb,±HbωH)] and LeviCivita superconnection  2.7 The superconnection A[sup(M)][sub(Φ,HωH)] and Poincaré duality  2.8 A 2parameter rescaling  2.9 A group action  Chapter 3. Hodge theory, the hypoelliptic Laplacian and its heat kernel  3.1 The cohomology of T*X and the Thom isomorphism  3.2 The Hodge theory of the hypoelliptic Laplacian  3.3 The heat kernel for [omitted][sup(2)][sub(Φ,Hc)]  3.4 Uniform convergence of the heat kernel as b → 0  3.5 The spectrum of [omitted][sup('2)][sub(Φb,±H)] as b → 0  3.6 The Hodge condition  3.7 The hypoelliptic curvature  Chapter 4. Hypoelliptic Laplacians and odd Chern forms  4.1 The Berezin integral  4.2 The even Chern forms  4.3 The odd Chern forms and a 1form on R*[sup(2)]  4.4 The limit as t → 0 of the forms u[sub(b,t)], v[sub(b,t)], w[sub(b,t)]  4.5 A fundamental identity  4.6 A rescaling along the fibers of T*X  4.7 Localization of the problem 

4.8 Replacing T* X by T[sub(x)]X [omitted] T*[sub(x)]X and the rescaling of Clifford variables on T*X  4.9 The limit as t → 0 of the rescaled operator  4.10 The limit of the rescaled heat kernel  4.11 Evaluation of the heat kernel for [omitted]  4.12 An evaluation of certain supertraces  4.13 A proof of Theorems 4.2.1 and 4.4.1  Chapter 5. The limit as t → +∞ and b → 0 of the superconnection forms  5.1 The definition of the limit forms  5.2 The convergence results  5.3 A contour integral  5.4 A proof of Theorem 5.3.1  5.5 A proof of Theorem 5.3.2  5.6 A proof of the first equations in (5.2.1) and (5.2.2)  Chapter 6. Hypoelliptic torsion and the hypoelliptic RaySinger metrics  6.1 The hypoelliptic torsion forms  6.2 Hypoelliptic torsion forms and Poincaré duality  6.3 A generalized RaySinger metric on the determinant of the cohomology  6.4 Truncation of the spectrum and RaySinger metrics  6.5 A smooth generalized metric on the determinant bundle  6.6 The equivariant determinant  6.7 A variation formula  6.8 A simple identity  6.9 The projected connections  6.10 A proof of Theorem 6.7.2  Chapter 7. The hypoelliptic torsion forms of a vector bundle  7.1 The function τ (c, η, x)  7.2 Hypoelliptic curvature for a vector bundle  7.3 Translation invariance of the curvature  7.4 An automorphism of E  7.5 The von Neumann supertrace of exp ([omitted][sup(E)][sub(c)] )  7.6 A probabilistic expression for Q'[sub(c)]  7.7 Finite dimensional supertraces and infinite determinants  7.8 The evaluation of the form Tr[sub(s)] [g exp ([omitted][sup(E)][sub(c)] )]  7.9 Some extra computations  7.10 The Mellin transform of certain Fourier series  7.11 The hypoelliptic torsion forms for vector bundles  Chapter 8. Hypoelliptic and elliptic torsions: a comparison formula 

8.1 On some secondary Chern classes  8.2 The main result  8.3 A contour integral  8.4 Four intermediate results  8.5 The asymptotics of the I[sup(0)][sub(k)]  8.6 Matching the divergences  8.7 A proof of Theorem 8.2.1  Chapter 9. A comparison formula for the RaySinger metrics  Chapter 10. The harmonic forms for b → 0 and the formal Hodge theorem  10.1 A proof of Theorem 8.4.2  10.2 The kernel of [omitted] as a formal power series  10.3 A proof of the formal Hodge Theorem  10.4 Taylor expansion of harmonic forms near b = 0  Chapter 11. A proof of equation (8.4.6)  11.1 The limit of the rescaled operator as t → 0  11.2 The limit of the supertrace as t → 0  11.3 A proof of equation (8.4.6)  Chapter 12. A proof of equation (8.4.8)  12.1 Uniform rescalings and trivializations  12.2 A proof of (8.4.8)  Chapter 13. A proof of equation (8.4.7)  13.1 The estimate in the range t ≤ b[sup(β)]  13.2 Localization of the estimate near π[sup(1)] X[sub(g)]  13.3 A uniform rescaling on the creation annihilation operators  13.4 The limit as t → 0 of the rescaled operator  13.5 Replacing X by T[sub(x)]X  13.6 A proof of (13.2.11)  13.7 A proof of Theorem 13.6.2  Chapter 14. The integration by parts formula  14.1 The case of Brownian motion  14.2 The hypoelliptic diffusion  14.3 Estimates on the heat kernel  14.4 The gradient of the heat kernel  Chapter 15. The hypoelliptic estimates  15.1 The operator [omitted][sup('2)][sub(Φb, ±H)]  15.2 A LittlewoodPaley decomposition  15.3 Projectivization of T*X and Sobolev spaces  15.4 The hypoelliptic estimates  15.5 The resolvent on the real line  15.6 The resolvent on C  15.7 Trace class properties of the resolvent  Chapter 16. Harmonic oscillator and the J[sub(0)] function  16.1 Fock spaces and the Bargman transform  16.2 The operator B(ξ) 

16.3 The spectrum of B(iξ)  16.4 The function J[sub(0)] (y, λ)  16.5 The resolvent of B(iξ) + P  Chapter 17. The limit of [omitted][sup('2)][sub(Φb, ±H)] as b → 0  17.1 Preliminaries in linear algebra  17.2 A matrix expression for the resolvent  17.3 The semiclassical Poisson bracket  17.4 The semiclassical Sobolev spaces  17.5 Uniform hypoelliptic estimates for P[sub(h)]  17.6 The operator P[sup(0)][sub(h)] and its resolvent S[sub(h,λ)] for λ ∈ R  17.7 The resolvent S[sub(h,λ)] for λ ∈ C  17.8 A trivialization over X and the symbols S[sup(d,k)][sub(ρ,δ,c)]  17.9 The symbol Q[sup(h)][sub(0)] (x,ξ)  λ and its inverse e[sub(0,h,λ)] (x, ξ)  17.10 The parametrix for S[sub(h,λ)]  17.11 A localization property for E[sub(0)], E[sub(1)]  17.12 The operator P[sub(±)]S[sub(h,λ)]  17.13 A proof of equation (17.12.9)  17.14 An extension of the parametrix to λ ∈ [omitted]  17.15 Pseudodifferential estimates for P[sub(±)]S[sub(h,λ)] i±  17.16 The operator Θ[sub(h,λ)]  17.17 The operator T[sub(h,λ)]  17.18 The operator (J[sub(1)]/J[sub(0)]) (hD[sup(X)]/√2, λ)  17.19 The operator U[sub(h,λ)]  17.20 Estimates on the resolvent of T[sub(h,h[sup(2)]λ]  17.21 The asymptotics of (L[sub(c)]  λ)[sup(1)]  17.22 A localization property  Bibliography  Subject Index  Index of Notation  A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y 

This book presents the analytic foundations to the theory of the hypoelliptic Laplacian. The hypoelliptic Laplacian, a secondorder operator acting on the cotangent bundle of a compact manifold, is supposed to interpolate between the classical Laplacian and the geodesic flow. JeanMichel Bismut and Gilles Lebeau establish the basic functional analytic properties of this operator, which is also studied from the perspective of local index theory and analytic torsion. The book shows that the hypoelliptic Laplacian provides a geometric version of the FokkerPlanck equations. The authors give the proper functional analytic setting in order to study this operator and develop a pseudodifferential calculus, which provides estimates on the hypoelliptic Laplacian's resolvent. When the deformation parameter tends to zero, the hypoelliptic Laplacian converges to the standard Hodge Laplacian of the base by a collapsing argument in which the fibers of the cotangent bundle collapse to a point. For the local index theory, small time asymptotics for the supertrace of the associated heat kernel are obtained. The RaySinger analytic torsion of the hypoelliptic Laplacian as well as the associated RaySinger metrics on the determinant of the cohomology are studied in an equivariant setting, resulting in a key comparison formula between the elliptic and hypoelliptic analytic torsions 

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Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, 2020. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries 
Link 
Print version: Bismut, JeanMichel The Hypoelliptic Laplacian and RaySinger Metrics. (AM167)
Princeton : Princeton University Press,c2008 9780691137322

Subject 
Differential equations, Hypoelliptic.;Laplacian operator.;Metric spaces


Electronic books

Alt Author 
Lebeau, Gilles


Bismut, JeanMichel

