Teichmüller’s Modulsatz and the Variation of the Dirichlet Integral. / Dubinin, V. N.
In: Siberian Mathematical Journal, Vol. 65, No. 2, 03.2024, p. 289-294.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Teichmüller’s Modulsatz and the Variation of the Dirichlet Integral
AU - Dubinin, V. N.
N1 - The work was supported by the Mathematical Center in Akademgorodok under the agreement no. 075–15–2022–282 with the Ministry of Science and Higher Education of the Russian Federation.
PY - 2024/3
Y1 - 2024/3
N2 - We show thatchanging the level curve of a harmonic functionwith the classical Hadamard variation with a small parameterentails a change in the Dirichlet integral of the functionwhich is quadratic in the parameter.As a corollary,we supplement the well-known theorem of Teichmüllerabout the sum of moduli of doubly connected domainsinto which an annulus is subdividedby a continuum that differs little from a concentric circle.
AB - We show thatchanging the level curve of a harmonic functionwith the classical Hadamard variation with a small parameterentails a change in the Dirichlet integral of the functionwhich is quadratic in the parameter.As a corollary,we supplement the well-known theorem of Teichmüllerabout the sum of moduli of doubly connected domainsinto which an annulus is subdividedby a continuum that differs little from a concentric circle.
KW - 517.956.224
KW - Dirichlet integral
KW - condenser capacity
KW - harmonic function
KW - modulus of a doubly connected domain
UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85188647101&origin=inward&txGid=53d968cce96291d1b74687f367c1e566
UR - https://www.mendeley.com/catalogue/b96b2af7-8b7e-3f7b-8d18-f6fed48b07b0/
U2 - 10.1134/S0037446624020058
DO - 10.1134/S0037446624020058
M3 - Article
VL - 65
SP - 289
EP - 294
JO - Siberian Mathematical Journal
JF - Siberian Mathematical Journal
SN - 0037-4466
IS - 2
ER -
ID: 61124745