Generalized Dedekind sums.
L. Carlitz (1964)
Mathematische Zeitschrift
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L. Carlitz (1964)
Mathematische Zeitschrift
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Daniel J. Kleitman (1965)
Mathematische Zeitschrift
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Chizuru Sekine (2005)
Acta Arithmetica
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Solomon Friedberg (1987)
Mathematische Zeitschrift
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G. Myerson (1985)
Mathematische Zeitschrift
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K.S. Rao (1936)
Mathematische Zeitschrift
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K.S. Rao (1935)
Mathematische Zeitschrift
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F.M. Ragab, T.M. MacRobert (1962)
Mathematische Zeitschrift
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L. Carlitz (1980)
Acta Arithmetica
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R.A. Rankin (1983)
Mathematische Annalen
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Wenpeng Zhang (2001)
Acta Arithmetica
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Robert Sczech (1994)
Mathematische Annalen
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Yumiko Nagasaka, Kaori Ota, Chizuru Sekine (2003)
Acta Arithmetica
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Emmanuel Tsukerman (2015)
Acta Arithmetica
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Using a generalization due to Lerch [Bull. Int. Acad. François Joseph 3 (1896)] of a classical lemma of Zolotarev, employed in Zolotarev's proof of the law of quadratic reciprocity, we determine necessary and sufficient conditions for the difference of two Dedekind sums to be in 8ℤ. These yield new necessary conditions for equality of two Dedekind sums. In addition, we resolve a conjecture of Girstmair [arXiv:1501.00655].