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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
Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences Transportation

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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.
SOME PROPERTIES OF CLEAR RINGS Yassin Dwi Cahyo; PERMATASARI, C. NOVITA; SUBASTIAN, NANDA; FARIZI, SALMAN; PUSPITA, NIKKEN PRIMA; SURYOTO, SURYOTO
Jurnal Matematika UNAND Vol. 15 No. 2 (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.15.2.196-212.2026

Abstract

Let (R, +, ·) be a ring with unity. An element in R is called a cleanelement if it is the sum of a unit element and an idempotent element. A ring R is calleda clean ring if all elements in R are clean elements. The notion of a clean element wasgeneralized to a clear element by replacing the idempotent element with a unit-regularelement. An element in R is called a clear element if it is the sum of a unit elementand a unit-regular element. A ring R is called a clear ring if all elements in R are clearelements. In this paper, we study the new properties of clear elements in a ring andclear properties in certain special rings, such as opposite rings, quotient rings, cornerrings, Morita rings, and group rings.
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 Farizi, Salman 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 PERMATASARI, C. NOVITA 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 SUBASTIAN, NANDA Suryoto Suryoto ., Suryoto Suryoto Suryoto Thomas, Abdiel Bellamy Titi Udjiani SRRM Utami, Ratna Zakiyya Meilia widowati widowati Yassin Dwi Cahyo Yeni Susanti