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TITIK TETAP REICH DI DALAM RUANG b-METRIK Ahmad Khairul Umam; Krisna Adilia Daniswara
Jurnal Matematika dan Sains (JMS) Vol. 2 No. 2 (2022): Jurnal Matematika dan Sains (JMS)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.552273/jms.v2i02.175

Abstract

Problem of linear equation, integral equation, and differential equation can be solved with a fixed point. One of generalization of metric space is b-metric space. This article discusses a lemma, a theorem and an example in b-metric space. We discuss a theorem about uniqueness and existence of fixed point.
The Fifth Coefficient Approximation of The Inverse Strongly Convex Function Krisna Adilia Daniswara; Aris Alfan; Ahmad Khairul Umam
Jurnal Matematika Sains dan Teknologi Vol. 24 No. 2 (2023)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33830/jmst.v24i2.4977.2023

Abstract

This paper discusses the fifth coefficient approximation of the inverse strongly convex function. Strongly convex function is a subclass of convex function. Those functions are included as univalent functions. Using corresponding lemmas, we give sharp limits for the fifth coefficient of the inverse strongly convex function. The limit is sharp if the value of the approximation has the same value as the limit. We verify that the limit of the fifth coefficient of the inverse strongly convex function differs from that of the strongly convex function in some interval but still have the same value in a point. Besides, we also explain that the sharp limit of the fifth inverse coefficient is less than or equal to one.
PENENTUAN NILAI OPSI ASIA PADA KOMODITAS BAWANG MERAH DENGAN MENGGUNAKAN METODE MONTE CARLO Rosydatul Muawanah Rosy; Fitroh Resmi; Krisna Adilia Daniswara
MathVisioN Vol 5 No 2 (2023): September 2023
Publisher : Prodi Matematika FMIPA Unirow Tuban

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55719/mv.v5i2.899

Abstract

Shallot is a commodity that is needed in everyday life. However, the uncertainty of the price of shallots makes farmers suffer losses. This uncertainty can be overcome by using options on the sale of shallots. The Asian option was chosen because it is cheaper than the other options. To determine the value of this Asian option, the commodity price return model is used. The method that fits this model is the Monte Carlo method. In this study, data on shallot commodity prices were taken on the website of the National Strategic Food Price Information Center (PIHPS Nasional) in traditional markets in Surabaya for 4 years. The research of this study indicate that when the strike price is more than the initial shallot price , then the Asian put option price is higher. Meanwhile, when the strike price is less than the initial shallot price , the price of the Asian put option is low.