Abstract
An exponential of the sum of three operators can be factorized formally as a product of three exponentials, if the three operators form a closed algebra.
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Mitter, H., Yamazaki, K. A factorization theorem for an exponential operator. Letters in Mathematical Physics 8, 321–324 (1984). https://doi.org/10.1007/BF00400503
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DOI: https://doi.org/10.1007/BF00400503