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This article is cited in 1 scientific paper (total in 1 paper)
New formula for $\ln(e^Ae^B)$ in terms of commutators of $A$ and $B$
M. V. Mosolova Moscow Institute of Electronic Engineering
Abstract:
We establish the formula
$$
\ln(e^Be^A)=\int_0^t\psi(e^{-\tau ad_A}e^{-\tau ad_B})e^{-\tau ad_A}\,d\tau(A+B),
$$
where $\psi(x)=(\ln x)/(x-1)$; here $A$ and $B$ are elements of a. finite-dimensional Lie algebra which satisfy certain conditions. This formula enables us, in particular, to give a simple proof of the Campbell–Hausdorff theorem. We also give a generalization of the formula to the case of an arbitrary number of factors.
Received: 02.06.1976
Citation:
M. V. Mosolova, “New formula for $\ln(e^Ae^B)$ in terms of commutators of $A$ and $B$”, Mat. Zametki, 23:6 (1978), 817–824; Math. Notes, 23:6 (1978), 448–452
Linking options:
https://www.mathnet.ru/eng/mzm8182 https://www.mathnet.ru/eng/mzm/v23/i6/p817
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Abstract page: | 255 | Full-text PDF : | 132 | First page: | 2 |
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