Abstract
We characterize associative power series in two indeterminates over a commutative ring.
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References
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Halter-Koch, F. Associative power series. Aequat. Math. 89, 765–769 (2015). https://doi.org/10.1007/s00010-014-0263-9
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DOI: https://doi.org/10.1007/s00010-014-0263-9