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SOLVING CONCRETE PROBLEMS IN NAVAL FRAMEWORK THROUGH CANONICAL MATHEMATICAL MODELS
Irina Cristea, Camelia Ciobanu, Claudia Pantelie, 2015, original scientific article

Abstract: The paper aims is to point out how good results in the management of shipping might be achieved through canonical mathematical models.
Found in: osebi
Keywords: mathematical model, North-west corner method, minimum element method, mixed differences method.
Published: 09.02.2016; Views: 2039; Downloads: 3
.pdf Fulltext (212,38 KB)

14.
SOLVING PRACTICAL PROBLEMS IN SHIPPING BY USING MATHEMATICAL MODELS
Irina Cristea, Camelia Ciobanu, Claudia Pantelie, 2015, original scientific article

Abstract: The purpose of this paper is to highlight how using mathematical algorithms, some practical problems on board can be more easily solved.
Found in: osebi
Keywords: mathematical model, Yu Chen algorithm, Bellman algorithm.
Published: 09.02.2016; Views: 1714; Downloads: 1
.pdf Fulltext (258,81 KB)

15.
On complementable semihypergroups
Morteza Jafarpour, Irina Cristea, Hossien Aghabozorgi, 2016, original scientific article

Abstract: n this paper, we first introduce the notion of complementable semihypergroup, proving that the classes of simplifiable semigroups, groups, and complete hypergroups are examples of complementable semihypergroups. Then we define when two semihypergroups are disjoint and find examples of such semihypergroups. Finally, we discuss on the complementable property of $K_H$-hypergroups.
Found in: osebi
Keywords: (semi)hypergroup, complementable semihypergroup, disjoint semihypergroup, $K_H$-hypergroup
Published: 03.03.2016; Views: 1855; Downloads: 1
.pdf Fulltext (687,01 KB)

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A class of hyperlattices induced by quasi-ordered semigroups
Irina Cristea, Michal Novak, Stepan Krehlik, 2017, published scientific conference contribution

Abstract: In this paper we study hyperstructure generalizations of lattices. We give conditions for EL-semihypergroups to be H_v-semilattices, hypersemilattices or hyperlattices. We also study some of their special elements.
Found in: osebi
Keywords: join hyperlattice, hyperlattice, hypersemilattice, quasi-ordered semigroup
Published: 06.02.2017; Views: 1605; Downloads: 1
.pdf Fulltext (337,41 KB)

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HEIGHT OF HYPERIDEALS IN NOETHERIAN KRASNER HYPERRINGS
Hashem Bordbar, Irina Cristea, Michal Novak, 2017, original scientific article

Abstract: Inspired by the classical concept of height of a prime ideal in a ring, we proposed in a precedent paper the notion of height of a prime hyperideal in a Krasner hyperring. In this note we first generalize some results concerning the height of a prime hyperideal in a Noetherian Krasner hyperring, with the intent to extend this definition to the case of a general hyperideal in a such hyperring. The main results in this note show that, in a commutative Noetherian Krasner hyperring, the height of a minimal prime hyperideal over a proper hyperideal generated by n elements is less than or equal to n, the converse of this claim being also true. Based on this result, it can be proved that the height of such a prime hyperideal is limited by the height of a corresponding quotient hyperideal.
Found in: osebi
Keywords: Krasner hyperring, prime/maximalhyperideal, Noetherian hyperring, height of a prime hyperideal
Published: 01.06.2017; Views: 1892; Downloads: 0
.pdf Fulltext (138,31 KB)

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