Functions of perturbed noncommuting self-adjoint operators. / Александров, Алексей Борисович; Nazarov, Fedor; Peller, Vladimir.
In: Comptes Rendus Mathematique, Vol. 353, No. 3, 01.03.2015, p. 209-214.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Functions of perturbed noncommuting self-adjoint operators
AU - Александров, Алексей Борисович
AU - Nazarov, Fedor
AU - Peller, Vladimir
N1 - Publisher Copyright: © 2014 Académie des sciences.
PY - 2015/3/1
Y1 - 2015/3/1
N2 - We consider functions f(. A, B) of noncommuting self-adjoint operators A and B that can be defined in terms of double operator integrals. We prove that if f belongs to the Besov class B∞,11(R2), then we have the following Lipschitz-type estimate in the trace norm: {norm of matrix}f(A1,B1)-f(A2,B2){norm of matrix}S1≤const({norm of matrix}A1-A2{norm of matrix}S1+{norm of matrix}B1-B2{norm of matrix}S1). However, the condition f∈B∞,11(R2) does not imply the Lipschitz-type estimate in the operator norm.
AB - We consider functions f(. A, B) of noncommuting self-adjoint operators A and B that can be defined in terms of double operator integrals. We prove that if f belongs to the Besov class B∞,11(R2), then we have the following Lipschitz-type estimate in the trace norm: {norm of matrix}f(A1,B1)-f(A2,B2){norm of matrix}S1≤const({norm of matrix}A1-A2{norm of matrix}S1+{norm of matrix}B1-B2{norm of matrix}S1). However, the condition f∈B∞,11(R2) does not imply the Lipschitz-type estimate in the operator norm.
UR - http://www.scopus.com/inward/record.url?scp=84922838530&partnerID=8YFLogxK
U2 - 10.1016/j.crma.2014.12.005
DO - 10.1016/j.crma.2014.12.005
M3 - Article
AN - SCOPUS:84922838530
VL - 353
SP - 209
EP - 214
JO - Comptes Rendus Mathematique
JF - Comptes Rendus Mathematique
SN - 1631-073X
IS - 3
ER -
ID: 87317248