On quasi-ideals and bi-ideals in ternary semirings.
Kar, S. (2005)
International Journal of Mathematics and Mathematical Sciences
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Kar, S. (2005)
International Journal of Mathematics and Mathematical Sciences
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Dönges, Christoph (1994)
International Journal of Mathematics and Mathematical Sciences
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Eugene M. Norris (1974)
Matematický časopis
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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).
Rosłanowski, Andrzej, Shelah, Saharon (1997)
Journal of Applied Analysis
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Imrich Fabrici (1981)
Mathematica Slovaca
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Kenneth M. Kapp (1969)
Czechoslovak Mathematical Journal
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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.