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Journal of Mathematics UNP

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Published by Universitas Negeri Padang

ISSN : 23551658 EISSN : 28073460 DOI : http://dx.doi.org/10.24036/unpjomath.v7i3.12564

Core Subject : Science, Education,

Computer Science & IT Decision Sciences, Operations Research & Management Mathematics

Journal of Mathematics UNP is a journal to publish article from student researches in UNP Mathematics study program, and we also kindly accept other article from outside of our study program related to Mathematics: consists of publication in Algebra, Analysis, Combinatoric, Geometry, Differential Equations, Graph and/or Mixed Mathematics Applications: consists of publication in Application of Differential Equations, Mathematics Modelling, Mathematics Physics, Mathematics Biology, Financial Mathematics, Application of Graph and Combinatorics, Optimal Control, Operation Research, and/ or Mixed Statistics: consists of publication on Development and/ or Application of statistics in various aspects.

Arjuna Subject : Matematika - Matematika (Lain-Lain)

Articles 404 Documents

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Faktor-Faktor yang Mempengaruhi Produksi Jagung di Desa Kayu Gadang Menggunakan Analisis Regresi Linier Berganda Ceng Sri Yunita; Helma Helma; Minora Longgom Nasution
Journal of Mathematics UNP Vol 6, No 2 (2021): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract –The village of Kayu Gadang is one of the villages in the subdistrict of South PesisirRegency silk economy society resting on farming corn. But the community does not yet have enough information about the factors that affect corn production such as land area, the distance to the source of the water, the land length of the trunks, width and fertilizer so that cause less productive corn production results obtained community which is around 602,549 tonnes by 2015 that should more than 605,352 tons in 2014. Based on the above issues, then the formulation of the problem in this research are factors that affect the production of any corn in the village of Kayu Gadang SouthPesisirRegency. The purpose of this research is to know what a linear multiple regression model and the factors that affect the production of maize in the village of Kayu Gadang South Pesisir Regency. Keywords –kayu gadang, the production of corn, multiple linear regression analysis

Analisa Tentang Luas Tanam dan Luas Panen di Bidang Komoditi Perkebunan di Provinsi Sumatera Barat dengan Menggunakan Analisis Profil Wella Saputri; Nonong Amalita
Journal of Mathematics UNP Vol 5, No 1 (2020): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract—The plantation is one of the agricultural sub-sectors and an important component in the formation of the PDRB of West Sumatra Province. Crop production from plantation commodities is also supported by the planting and harvesting area. The planting area will affect into the harvesting area. In West Sumatra, there are several regions has a large amount of planting area but result in avery small amount of harvesting area. The purpose of this study is to see a comparative picture of planting and harvesting area in West Sumatra Province by using profile analysis, with ten variables of plantation commodities. Based on the results of the two population profile analysis test, the profile of planting and harvesting area of plantation commodities in West Sumatra Province were similar. There were two variables that did not have the same mean i.e. gambier and cocoa. Keywords—Planted Area, Harvested Area, Profile Analysis

Aplikasi Met.ode Sin.gle In.dex dal.am Pembentukan Port.ofolio Opt.imal da.ri Indeks Sah.am LQ – 45 Muhammad Hafizh Ekaputra; Media Rosha
Journal of Mathematics UNP Vol 5, No 3 (2020): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract — Investment is the activity of placing a number of funds at the present time with the aim of obtaining future benefits. The problem faced by investors is determining which stocks to choose in order to get maximum profit. Steps taken in order to get maximum profit is to form an optimal portfolio. T.he pu.rpose of th.is st.udy is to fo.rm an optimal portfolio of stocks incorporated in LQ-45 in the period August 2018 - July 2019 and determine the proportion of funds for each member of the opti.mal port.folio for.med using the sin.gle ind.ex met.hod. This study uses secondary data obtained from Yahoo Finance and Bank Indonesia. Purposive sampling is the sampling technique used. There are 41 stocks that still survive du.ring the obser.vation per.iod. The results of the analysis obtained from 41 LQ-45 stocks are that there are four stocks that are included in the optimal portfolio, namely; ADHI, EXCL, MNCN and TLKM with each proportion of funds of 4.081944%, 9.9706955%, 3.1884027%, and 82.7589578%. Keywords --- investation, portofolio, single index method

Estimasi Bayes pada Distribusi Pareto dengan Data Tersensor Tipe II Atika Ahmad; Nonong Amalita
Journal of Mathematics UNP Vol 3, No 2 (2018): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract Parameter’s estimation is used to estimate the parameter values of a discrete distribution as well as a continuous distribution. One form of continuous distribution is the Pareto distribution, where the Pareto distribution has parameters, they are theta dan lambda. The method used to estimate parameters is Bayes estimation. Bayes Estimation has its own way of determining the initial distribution form (prior) and posterior distribution. Parameter’s estimations are also used in one statistical analysis technique that investigates the survival of an product or individual. The life test data used is type II censored data where the experiment will be stopped after getting r data. This reseach aims to determine the form of parameter estimators and in the Pareto distribution on type II censored data using Bayes estimation. The results in this reseach obtained the form of posterior distribution from Pareto distribution on type II censored data and form of estimator theta dan lambda.

Metode Euler-Milstein untuk Solusi Numerik Persamaan Diferensial Stokhastik Ornstein-Uhlenbeck Taufik Iqbal; Muhammad Subhan
Journal of Mathematics UNP Vol 5, No 4 (2020): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract —The Ornstein-Uhlenbeck.equation is a stochastic differential equation, this equation.isoften used in the financial mathematical model. However, to find the solution the Ornstein Uhlenbeck equation.is.difficult.to complete analytic so it can also be solved by looking for numerical solutions. To get a better numeric solution it is required a numeric. method by. looking at converged. The purpose of the study is to examine. the Euler-Milstein method formula for the solution of the Ornstein-Uhlenbeck equation, shows that numerical solution of Ornstein-Uhlenbeck equation that resulted by Euler-Milstein.method has strong convergence. to exact solutions and create an algorithm to find the solution of Ornstein-Uhlenbeck equation with the Euler-Milstein method.Keywords — stochastic.differential.Equations, ornstein-uhlenbeck equation, euler- milstein method

Pengelompokkan Sembilan Kabupaten/Kota di Provinsi Sumatera Barat Berdasarkan Tingkat Kriminalitas dengan Menggunakan Analisis Gerombol Chairina Wirdiastuti; Helma Helma
Journal of Mathematics UNP Vol 4, No 2 (2019): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract Crime is an act that violates the law. Sumatra Barat Province have a high criminal. Criminals can make big problem for criminal victims, such as death, disability, material losses and others. The increase of crime is caused by several problem such as economic, social, conflict and etc. Crime is an element that explains the quality of sociaty and the law of a region. For that, it is necessary to know the groups of regencies/cities in the Province of Sumatera Barat based on crime rates so that the government can evaluate crime and improve some policies towards a region that has high crime. Data was obtained from the Central Agency on Statistics which showed the number of cases that occurred in regencies/cities in Sumatra Barat Province. Using cluster analysis with hirarchical method, it was concluded that regencies/cities in Sumatra Barat province were divided into three groups where group one consist of Solok Regency, group two consist of Tanah Datar Regency, Padang Pariaman Regency, Lima Puluh Kota Regency, Solok Selatan Regency, Dharmasraya Regency, Pariaman City, and Sawahlunto City and group three consists of Bukittingi City.KeywordsCrime, Cluster Analysis, Hierarchical Method

PERBANDINGAN KINERJA METODE AVERAGE LINKAGE DAN WARD DALAM PENGELOMPOKAN TINGKAT KESEJAHTERAAN MASYARAKAT PROVINSI SUMATERA BARAT MENURUT KABUPATEN/KOTA TAHUN 2021 Riska Ramadani; Admi Salma
Journal of Mathematics UNP Vol 7, No 3 (2022): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Welfare in West Sumatra Province is still an important problem that is being faced the whole community in 2021. The government is still trying to improve performance the welfare of the community from all aspects. It is necessary to grouping the level of community welfare in the Province of West Sumatra by Regency/City using the average linkage and Ward methods. The results of the cluster analysis obtained by both methods show that the clusters formed are same but objects in the clusters are different. Consists of 3 clusters, namely cluster 1 with a low level of welfare, cluster 2 with a medium level of welfare and cluster 3 with a high level of welfare. Of the two methods, the average linkage method is better in grouping than Ward method the levels of welfare based on validity because it has a large Dunn Index value is 0,88 and a small Connectivity value is 5,85

Optimasi Portofolio dengan Lexicographic Goal Programming pada Bursa Efek Indonesia Nilam Purnama Sari; Muhammad Subhan; Dewi Murni
Journal of Mathematics UNP Vol 6, No 1 (2021): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract – A portfolio is a collection of investment opportunity that aims to select a combination of efficient of shares owned, in the form of profit (return) is optimal in forming the optimal portfolio, there are three criteria that must be considered, maximizing the total funds that, maximizing expected return, minimizing risk market (systematic risk coefficients). One model that can solve this problem is lexicographic goal programming. research purposes is how to obtain a stock portfolio optimation with lexicographic goal programming and the proportion of the funds invested. The method used is descriptive method that analyzes the theories related to lexicographic goal programming. The result obtained is an optimum portfolio.Keywords – investment, portfolio, return, the coefficient of systematic risk, lexicographic goal programming

Penyelesaian Permasalahan Non Linear dengan Pendekatan Linearisasi Dua Fase Maharani Safitri; Muhammad Subhan
Journal of Mathematics UNP Vol 5, No 1 (2020): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract—A nonlinear optimization problems with complicated nonlinear objective functions with nonlinear constraints is difficult to complete analytic but can be solved numerically. Research is conducted to seek solution of non-linear with constrained or not problems using a two-phase linearization approach. The result of this research is the solution of non-linear problems of minimum or maximum occupancy of the smallest residue.Keywords—Linear Programming Problems, Nonlinear Programming Problems, Linearization Approach, Taylor Series, Maclaurin series.

Model Matematika Kerusakan Sumber Daya Hutan di Indonesia Nur Suci; Arnellis Arnellis; Media Rosha
Journal of Mathematics UNP Vol 2, No 1 (2014): Journal Of Mathematics UNP
Publisher : UNIVERSITAS NEGERI PADANG

Abstract – The Degradation of forestry resources is a serious problem is faced by Indonesian country. The growth of population people and augment industrialization in Indonesia gave a negative effect to forestry resources. Its happen if the utilization continuously without preservation. The purpose of this study is to see the dynamic degradation of forestry resources that can be done by modeling the influence population growth and augment industrialization to forestry resources in the form of a mathematical model. The form of mathematical models equations a non-linear differential equations system. Furthermore Mathematical model that we get be analysised and the result is interprestationed to answer the problem. According the analysis of mathematical model dynamics degradation of forestry resources in Indonesia is gotten by two types of fixed point; fixed point interference free ( ) and fixed point interference ( and ), and then we get obtained the stability of each fixed. Keywords – Degradation of Forestry, Industrialization, Mathematical Models, Population People Stability.

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Home Page

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Contact Name Defri Ahmad

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Phone +6281374333545

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Editorial Address Jl. Prof. dr. Hamka Air Tawar Barat Padang

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Contact Name
Defri Ahmad

Contact Email
defri_math@fmipa.unp.ac.id

Phone
+6281374333545

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defri_math@fmipa.unp.ac.id

Editorial Address
Jl. Prof. dr. Hamka Air Tawar Barat Padang

Location
Kota padang,

Sumatera barat

INDONESIA