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Square : Journal of Mathematics and Mathematics Education
Published by Universitas Islam Negeri Walisongo Semarang
ISSN : 2714609X     EISSN : 27145506     DOI : 10.21580
Core Subject : Education,
Education Mathematics
Square : Journal of Mathematics and Mathematics Education menerbitkan artikel kajian di bidang pendidikan matematika dan kajian matematika
Arjuna Subject : Matematika - Aljabar dan Teori Bilangan
Articles 5 Documents
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Search results for , issue "Vol. 7 No. 1 (2025)" : 5 Documents clear
Dimensi Metrik pada Graf Hasil Operasi Join pada Graf Lengkap dan Graf Tangga Rahmadi, Deddy; Febriantono, Awal; Mufidah, Nurul; Hidayati, Tsalis Wifqi; Alisyah, Maulidatu Jauharoti
Square : Journal of Mathematics and Mathematics Education Vol. 7 No. 1 (2025)
Publisher : UIN Walisongo Semarang

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Abstract

The metric dimension of a graph is defined as the minimum cardinality of a resolving set of the graph. This study aims to determine the metric dimension of graphs obtained from the join operation between a complete graph and a ladder graph. The analysis begins by determining the metric dimensions of the constituent graphs, namely the complete graph K_n and the ladder graph L_m. Furthermore, the metric dimension of the graph resulting from the join operation K_n + L_m is investigated. The results show that the metric dimension of the complete graph K_n is n-1, the metric dimension of the ladder graph L_m is 2, and the metric dimension of the graph K_n+L_m is n+1.
Optimizing Industrial Policy: Predicting Population Growth in Kediri Regency Using Mathematical Equations Surur, Agus Miftakus; Diana, Dinda Fatikhatut; Fahma, Farisa Aina; Laili, Eva Alvi Nur; Anggraini, Atika; Arifin, Syamsul; Chuquin, Ector Geovanny Pupiales
Square : Journal of Mathematics and Mathematics Education Vol. 7 No. 1 (2025)
Publisher : UIN Walisongo Semarang

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Abstract

The purpose of this study is to predict the population of Kediri Regency in the year 2030. Kediri Regency was selected because the region hosts an industry with national and international scale. The research method employed in this study is a literature-based approach utilizing population data obtained from the official website of the Government of Kediri Regency. The modeling approach applied is based on differential equations, specifically the Bernoulli growth model. The result of this study shows that the predicted population of Kediri Regency in 2030 is 1,590,753 people. When compared to the population in 2020, this result indicates a decrease of 44,541 people. Nevertheless, the predicted population remains relatively high, so when linked to government policy, several adjustments are required, similar to those implemented during the period from 2010 to 2020. The results of this study are important for the regency government as a basis for formulating policies, particularly in the industrial sector. Regions that develop as industrial areas require data-based planning, so the results of mathematical equation calculations can be used as objective references. Through appropriate policies, it is expected that local communities, especially local residents, can work and build their careers within their own region. Thus, the potential of local human resources can be maintained and utilized optimally. In addition, this study can also be applied by researchers or local governments in other regions to predict population size and adjust policies according to the conditions of their communities.
Analisis Dinamika Angka Pernikahan Menggunakan Metode Triple Exponential Smoothing (Studi Kasus KUA Kecamatan Sokaraja, Kabupaten Banyumas Tahun 2025) Sari, Novita; Tengger, Billy Arifa; Kartika, Dwiani Listya
Square : Journal of Mathematics and Mathematics Education Vol. 7 No. 1 (2025)
Publisher : UIN Walisongo Semarang

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Abstract

ABSTRAK Pernikahan merupakan proses sakral dan memiliki signifikansi besar pada kehidupan manusia. Beberapa diantaranya adalah meningkatkan stabilitas ekonomi melalui penggabungan sumber daya dan pendapatan suami dan istri, mengurangi angka pergaulan bebas yang merusak masa depan, dan data pernikahan dapat digunakan oleh pemerintah untuk mempersiapkan kebijakan kependudukan, struktur demografi dan perencanaan pembangunan daerah. Namun dalam lima tahun terakhir tren penurunan angka pernikahan di Kecamatan Sokaraja Kabupaten Banyumas cukup signifikan. Diantara faktor-faktor yang mempengaruhi penurunan angka pernikahan tersebut adalah meningkatnya kemandirian ekonomi perempuan, tingginya tingkat pendidikan, tingginya kesadaran akan pentingnya kesiapan mental dan finansial sebelum menikah dan sebagainya. Oleh karena itu, penting bagi pemerintah dan KUA Kecamatan sokaraja untuk memahami dan menentukan suatu kebijakan yang mendukung keseimbangan antara pembangunan ekonomi, sosial dan keluarga dengan melakukan suatu peramalan. Peramalan ini bertujuan memberikan nilai ramalan angka pernikahan yang terjadi pada periode mendatang. Pada penelitian ini, menggunakan metode Triple Exponential Smoothing dengan nilai konstanta alpha yang digunakan adalah sebesar 0,1. Pengujian ini menghasilkan nilai ramalan angka pernikahan di tahun 2025 adalah sejumlah 374 dengan nilai MAPE sebesar 41%, yang menunjukkan bahwa tingkat kesalahan peramalan relatif tinggi, namun masih berada dalam rentang yang dapat diterima untuk menggambarkan pola dan kecenderungan perubahan angka pernikahan pada periode mendatang.   ABSTRACT Marriage is a sacred process and has great significance in human life. Some of them are increasing economic stability through the pooling of resources and income of husband and wife, reducing the rate of promiscuity that damages the future, and marriage data can be used by the government to prepare population policies, demographic structures and regional development planning. However, in the last five years, the trend of decreasing marriage rates in Sokaraja District, Banyumas Regency has been quite significant. Among the factors that affect the decline in the marriage rate are the increase in women's economic independence, the high level of education, the high awareness of the importance of mental and financial readiness before marriage and so on. Therefore, it is important for the government and the KUA of Sokaraja District to understand and determine a policy that supports a balance between economic, social and family development by conducting a forecast. This forecast aims to provide a predictive value of the number of marriages that occur in the coming period. In this study, the Triple Exponential Smoothing method was used with an alpha constant value of 0.1. The forecasting results indicate that the projected number of marriages in 2025 is 374, with a Mean Absolute Percentage Error (MAPE) of 41%, indicating that the forecasting error is relatively high; however, it remains within an acceptable range for describing patterns and trends in changes in marriage rates in future periods.
Analisis Kemampuan Komunikasi Matematis Siswa dalam Menyelesaikan Permasalahan Kontekstual Berdasarkan Gender Kelas VIII-G SMPN 23 Semarang Rachmawati, Dewi; Rohman, Ahmad Aunur; Norasia, Yolanda
Square : Journal of Mathematics and Mathematics Education Vol. 7 No. 1 (2025)
Publisher : UIN Walisongo Semarang

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Abstract

Mathematical communication skills are the basic ability to formulate initial concepts in solving mathematical problems. The level of mathematical communication skills can be influenced by various factors, one of which is gender. This study used a qualitative method through a descriptive approach, with the aim of describing the mathematical communication skills of class VIII-G students at SMPN 23 Semarang based on gender. Data were obtained through tests, questionnaires, and interviews. The results showed that students in the masculine, feminine, and androgynous categories mastered mathematical communication skills. Students with masculine and androgynous genders had the same understanding of all mathematical communication skill indicators used, while students with feminine genders failed to master any of the mathematical communication skill indicators used. The difference in mastery of mathematical communication skill indicators between masculine and androgynous students and feminine students lies in forming mathematical models through pictorial illustrations.
Handling Multicollinearity using Least Absolute Shrinkage and Selection Operator Regression on Per Capita Expenditure Data Rahma, Della Setya; Nisa, Eva Khoirun
Square : Journal of Mathematics and Mathematics Education Vol. 7 No. 1 (2025)
Publisher : UIN Walisongo Semarang

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Abstract

Multicollinearity is a problem that must be addressed when using regression. Multicollinearity often occurs in socioeconomic data, such as Per Capita Expenditure. Several relevant studies have shown that Least Absolute Shrinkage and Selection Operator (LASSO) regression is a good method for handling multicollinearity. Additionally, it produces the simple model. Meanwhile, the Least Angle Regression (LAR) algorithm works effectively in model optimization, especially when multicollinearity occurs in multiple variables. Therefore, this study aims to handle multicollinearity with LAR LASSO regression in the specific case of per capita expenditure data in Wonosobo with many variables experiencing multicollinearity. The result study is LAR LASSO regression successfully eliminated two of the four predictor variables that exhibited multicollinearity by reducing the regression coefficients on the two predictor variables to zero. The best regression model obtained produces two significant coefficients so that Per Capita Expenditure in Wonosobo was influenced by the Human Development Index and Average Years of Schooling.

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