On the generalization of trigonometric identities in arithmetical paraphrasing
Author:
H. T. Engstrom
Journal:
Bull. Amer. Math. Soc. 36 (1930), 667-672
DOI:
https://doi.org/10.1090/S0002-9904-1930-05033-8
MathSciNet review:
1562034
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