Linear Operators: Spectral theory |
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Page 950
... measure is unique up to multiplication by positive numbers , and is called Haar measure . In the case R = ( —∞ , ∞ ) , the Haar measure may be taken to be Lebesgue measure : in the case of a compact group , its existence and ...
... measure is unique up to multiplication by positive numbers , and is called Haar measure . In the case R = ( —∞ , ∞ ) , the Haar measure may be taken to be Lebesgue measure : in the case of a compact group , its existence and ...
Page 1152
... Haar measure which , though elementary , are not obvious consequences of the invariance property . 4 LEMMA . Let R be a locally compact , o - compact , Abelian topological group , E its Borel field , and λ its Haar measure . Then λ ( E ...
... Haar measure which , though elementary , are not obvious consequences of the invariance property . 4 LEMMA . Let R be a locally compact , o - compact , Abelian topological group , E its Borel field , and λ its Haar measure . Then λ ( E ...
Page 1154
... Haar measure in R. Then the product measure λλ is a Haar measure in R × R. = PROOF . Since the product group R ( 2 ) RR is locally compact and o - compact , it has a Haar measure ( 2 ) defined on its Borel field ( 2 ) and what we shall ...
... Haar measure in R. Then the product measure λλ is a Haar measure in R × R. = PROOF . Since the product group R ( 2 ) RR is locally compact and o - compact , it has a Haar measure ( 2 ) defined on its Borel field ( 2 ) and what we shall ...
Contents
BAlgebras | 859 |
Commutative BAlgebras | 868 |
Commutative BAlgebras | 874 |
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adjoint extension adjoint operator algebra analytic B-algebra Borel set boundary conditions boundary values bounded operator C₁ closed closure coefficients compact operator complex numbers continuous function converges Corollary deficiency indices Definition denote dense eigenvalues element equation essential spectrum Exercise exists finite dimensional follows from Lemma follows from Theorem follows immediately formal differential operator formally self adjoint formula Fourier function defined function f Hence Hilbert space Hilbert-Schmidt operator identity inequality integral interval isometric isomorphism kernel L₁ L₁(R L₂(I L₂(R Lemma Let f linear linearly independent mapping matrix measure neighborhood non-zero norm open set operators in Hilbert orthogonal orthonormal basis Plancherel's theorem positive preceding lemma PROOF prove real axis satisfies sequence solution spectral spectral theorem square-integrable subset subspace Suppose T₁ T₁(t T₂ theory To(t topology tr(T unique unitary vanishes vector zero