1. Cover-Vol 1- Issue 4- November 2020

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2. Lattices of fractions and flat morphisms of bounded distributive lattices

Pages 1-19

G. Georgescu

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3. Some types of derivations in bounded commutative residuated lattices

Pages 21-37

Darline Laure Keubeng Yemene; Luc Diekouam; Daniel Akume; Celestin Lele

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4. Ideals in pseudo-hoop algebras

Pages 39-53

Fei Xie; Hongxing Liu

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5. Characterization of ordered semihypergroups in terms of uni-soft bi-hyperideals

Pages 55-70

Muhammad Farooq; Asghar Khan; Raees Khan; Muhammad Izhar

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6. Connected between reversible regular hypergroups, t-fuzzy subgroups and t-fuzzy graphs

Pages 71-82

S. Mirvakili; H. Naraghi

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7. On fuzzy implicative ideals in BL-algebras

Pages 83-94

A. Paad

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8. Relation between hyper $K$-algebras with superlattices and hypersemilattices

Pages 95-106

Afagh Rezazadeh; Akefe Radfar

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9. Persian translation of abstracts

Pages 107-115

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