On the subsemilattices of first-order definable and openly first-order definable congruences of the congruence lattice of a universal algebra.
Pinus, A.G. (2006)
Sibirskij Matematicheskij Zhurnal
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Pinus, A.G. (2006)
Sibirskij Matematicheskij Zhurnal
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Janusz Szmidt, Jerzy Urbanowicz, Don Zagier (1995)
Acta Arithmetica
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Takashi Agoh, Ladislav Skula (1996)
Acta Arithmetica
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Vinokurov, N.S. (2006)
Sibirskie Ehlektronnye Matematicheskie Izvestiya [electronic only]
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Pinus, A.G. (2009)
Sibirskij Matematicheskij Zhurnal
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Nobuhiko Ishida (1998)
Acta Arithmetica
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J. C. Wilson (1994)
Acta Arithmetica
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Hourong Qin (1995)
Acta Arithmetica
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Joseph B. Muskat, Blair K. Spearman, Kenneth S. Williams (1995)
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Stanislav Jakubec (1998)
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The results of [2] on the congruence of Ankeny-Artin-Chowla type modulo p² for real subfields of of a prime degree l is simplified. This is done on the basis of a congruence for the Gauss period (Theorem 1). The results are applied for the quadratic field ℚ(√p), p ≡ 5 (mod 8) (Corollary 1).
Borodin, O.V., Ivanova, A.O., Neustroeva, T.K. (2004)
Sibirskie Ehlektronnye Matematicheskie Izvestiya [electronic only]
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Čomić, Irena, Stojanov, Jelena, Grujić, Gabrijela (2008)
Novi Sad Journal of Mathematics
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