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Bi-ideals in k-regular and intra k-regular semirings

S. Leeratanavalee, S. Phuapong

Pre-strongly solid varieties of commutative semigroups

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On congruence distributivity of ordered algebras with constants

A. Walendziak

On maximal ideals of pseudo-BCK-algebras

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A note on hypervector space

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Leaping convergents of Hurwitz continued fractions