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All Journal Pythagoras: Jurnal Matematika dan Pendidikan Matematika MATEMATIKA Journal of the Indonesian Mathematical Society Journal of Natural Sciences and Mathematics Research Al-Jabar : Jurnal Pendidikan Matematika BAREKENG: Jurnal Ilmu Matematika dan Terapan Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA JTAM (Jurnal Teori dan Aplikasi Matematika) Jambura Journal of Mathematics Jurnal Matematika UNAND Jurnal Pengabdian Kepada Masyarakat (JPKM) Tabikpun Pattimura Proceeding : Conference of Science and Technology Jurnal Sosial dan Sains Jurnal Pengabdian West Science Pemberdayaan Masyarakat: Jurnal Aksi Sosial Integra: Journal of Integrated Mathematics and Computer Science
Nikken Prima Puspita
Departemen Matematika, Fakultas Sains Dan Matematika, Universitas Diponegoro, Indonesia
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LEONTIEF MATRIX: BUSINESS MODEL RECOMMENDATION FOR EXPORT COMMODITY OF NORTH SUMATERA Khasanah, Nur; Puspita, Nikken Prima; Hasnani, Fitriana; Fatimah, Meryta Febrilian; Ikhtiyar, Zakaria Bani
Jurnal Matematika UNAND Vol. 15 No. 1 (2026)
Publisher : Departemen Matematika dan Sains Data FMIPA Universitas Andalas Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jmua.15.1.95-107.2026

Abstract

The open model as the one the application of Leontief model using the explanation of the economy with input-output model. The open model shows the number of productions needed to satisfy an increase in internal and external demand. By using the operation linear algebra operation on ring characteristics, then the production numbers are calculated. This method is applied on the ten product-producing commodities of North Sumatera export demand to find the total production number, while the amount of demand is defined. It shows a solution to the minimization linear program is the solution that will satisfy both internal and external demands of the commodity with minimum inventory level.
Characterization and Cartesian Product of Smarandache Semigroups (S-semigroups) Fadhilah, Laila Karimatul; Suryoto; Nikken Prima Puspita; Titi Udjiani
Integra: Journal of Integrated Mathematics and Computer Science Vol. 3 No. 1 (2026): March
Publisher : Magister Program of Mathematics, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/integrajimcs.20263149

Abstract

Let (S, *) be a semigroup. A semigroup S is called a Smarandache semigroup (or S-semigroup) if it contains a proper subset A ⊂ S such that (A, *) forms a group under the same binary operation defined on S. In general, not every semigroup admits a proper subset that is a group; hence, not all semigroups are S-semigroups. In this paper, several structural conditions related to Smarandache semigroups are investigated. In particular, we study the role of idempotent and completely regular elements in the structure of S-semigroups. These conditions provide a characterization of S-semigroups. Furthermore, this study investigates whether the Cartesian product of two or more S-semigroups is again an S-semigroup.
Co-Authors 'Aliyah, Dheva Ufiz Adillah, Aisyah Nur Agung, Nadiva Putri Ahmadil Hamdi Alfiana, Shinta Nur Alhusna, Lathifatul Inayah Aris Puji Widodo Azarine, Dinda Bambang Irawanto Berlian Arswendo Adietya Budi Surodjo Budi Surodjo Cahyo, Yassin Dwi Damayanti, Athalia Dwi Lestari Eminugroho Ratna Sari Fadhilah, Laila Karimatul Feriyanto, Erikha Fitriana Hasnani Fitriana Hasnani Fitriani Fitriani Hanifah, Zaqi Afif Harjito - Hasnani, Fitriana Hermawati, Dinda Widya I Gede Adhitya Wisnu Wardhana Ikhtiyar, Zakaria Bani Indah E Wijayanti Indah Emilia Wijayanti Indah Emilia Wijayanti Intan Nadilah Juwanda, Farikhin Lucia Ratnasari Maulani Rizqi Meryta Febrilian Fatimah Meryta Febrilian Fatimah, Meryta Febrilian Mudrikah Mudrikah Mudrikah, Mudrikah Mufliha, Azza Nur Khasanah Nuralesa, Suffi Nurdin Bahtiar Nurhasmadiar Nandini Nurhayati, Neri Nurul Fadhilah Paramita, Arum Qurrotulaini Pradjna Pradipta, Benediktus Panji Rahma, Suhaila Faiza Rakha, Andrea Putra Razis Aji Saputro Redemtus Heru Tjahjana Risti Sokawati Saputro, Razis Aji Sartika Silalahi, Jennifer Evelyn Shabah, Shava Shavia Siti Khabibah Siti Khabibah Sokawati, Risti Suryoto Suryoto ., Suryoto Suryoto Suryoto Thomas, Abdiel Bellamy Titi Udjiani SRRM Utami, Ratna Zakiyya Meilia widowati widowati Yeni Susanti