Elementary Approximation of Exponentials of Lie Polynominals
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چکیده
Let L = L(x1, . . . , xm) be a graded Lie algebra generated by {x1, . . . , xm}. In this paper, we show that for any element P in L and any order k, exp(P ) may be approximated at the order k by a finite product of elementary factors exp(λixi). We give an explicit construction that avoids any calculation in the Lie algebra.
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تاریخ انتشار 1997