On ideal groups of algebraic number fields.
Shin Nakano (1985)
Journal für die reine und angewandte Mathematik
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Shin Nakano (1985)
Journal für die reine und angewandte Mathematik
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Humio Ichimura (2002)
Acta Arithmetica
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Eiji Yoshida (2003)
Acta Arithmetica
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Keiichi Komatsu (1991)
Manuscripta mathematica
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Piotr Kalemba (2015)
Open Mathematics
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The ideal (v0) is known in the literature and is naturally linked to the structure [ω]ω. We consider some natural counterpart of the ideal (v0) related in an analogous way to the structure Dense(ℚ) and investigate its combinatorial properties. By the use of the notion of ideal type we prove that under CH this ideal is isomorphic to (v0).
Pavel Kraemer (2006)
Mathematica Slovaca
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Franz Lemmermeyer (2008)
Acta Arithmetica
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Rosłanowski, Andrzej, Shelah, Saharon (1997)
Journal of Applied Analysis
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Daniel S. Kubert (1986)
Journal für die reine und angewandte Mathematik
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Xiao Long Xin, Rajab Ali Borzooei, Young Bae Jun (2019)
Bulletin of the Section of Logic
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The notion of positive implicative soju ideal in BCK-algebra is introduced, and several properties are investigated. Relations between soju ideal and positive implicative soju ideal are considered, and characterizations of positive implicative soju ideal are established. Finally, extension property for positive implicative soju ideal is constructed.
Sudesh K. Gogia, Indar S. Luthar (1979)
Colloquium Mathematicae
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Scheja, Günter, Storch, Uwe (1996)
Beiträge zur Algebra und Geometrie
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Akira Endo (1990)
Manuscripta mathematica
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