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A list of all the posts and pages found on the site. For you robots out there is an XML version available for digesting as well.
Pages
Posts
Series Problem From JAA Advanced
Published:
For positive integer \(n\), define $$f(n) = n + \frac{16+5n-3n^2}{4n+3n^2} + \frac{32+n-3n^2}{8n+3n^2}+\frac{48-3n-3n^2}{12n+3n^2}+\cdots + \frac{25n-7n^2}{7n^2}.$$ Then, evaluate \(\lim\limits_{n\to \infty}f(n)\).
Cool Geometry Problem from KTO August 2022
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Let \(\overline{BD}\) and \(\overline{CE}\) be the altitudes of acute triangle \(ABC\). Let \(\omega_B\) and \(\omega_C\) be the circles with diameter \(\overline{BD}\) and \(\overline{CE}\), respectively. Suppose \(\overline{BD}\) intersect \(\omega_C\) at \(P\), \(\overline{CE}\) intersect \(\omega_B\) at \(R\), \(\omega_B\) and \(\omega_C\) intersects at \(X\) and \(Y\). If \(\overline{XY}\) intersect \(\overline{DE}\) at \(T\), prove that \(\overline{TP}=\overline{TR}\).
olympiad-exam
portfolio
Contest Collections
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Contains problems and solutions from several contests. Provided bahasa only. If you're on mobile and it cannot be downloaded, then use a browser other than Chrome. If that still doesn't work, use a laptop or PC.
Euclidean Geometry in Mathematical Olympiad by Evan Chen
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Contains problems and solutions from the problem section in Euclidean Geometry in Mathematical Olympiad. Provided bahasa only.
Midterm and Final Exam in Universitas Brawijaya
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All of these problems were taken from the exam at Universitas Brawijaya. Provided bahasa only. If you're on mobile and it cannot be downloaded, then use a browser other than Chrome. If that still doesn't work, use a laptop or PC.
Olympiad Reading Material
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These handouts are intended for senior high school olympiads and will be updated if necessary. If you're on mobile and it cannot be downloaded, then use a browser other than Chrome. If that still doesn't work, use a laptop or PC.
publications
talks
Talk 1 on Relevant Topic in Your Field
Published:
This is a description of your talk, which is a markdown files that can be all markdown-ified like any other post. Yay markdown!
Conference Proceeding talk 3 on Relevant Topic in Your Field
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This is a description of your conference proceedings talk, note the different field in type. You can put anything in this field.
teaching
Introducing About Mathematical Olympiad to Teachers in Lampung
Community Service, Yayasan Fatimah Az Zahra Lampung, 2022
Participating in the community service program, Dosen Berkarya, with Dr. Darmajid S.Si.,M.Si. and Dra. Andari, MS. for two days. Lecturing for teachers in Lampung on junior and senior high school about mathematical olympiads.
Lecturer’s Assistant and Peer Tutor
Teaching, Universitas Brawijaya, Mathematics Department, 2023
I have served as a Lecturer’s Assistant and Peer Tutor for undergraduate mathematics courses, including Calculus and Abstract Algebra, providing academic support through supplementary problem-solving sessions and guided discussions to strengthen students’ conceptual understanding.
International Mathematical Olympiad Instructor
Teaching, Online, 2026
I have been serving as a geometry instructor for the International Mathematical Olympiad (IMO) training program since 2024. I was specifically appointed to teach advanced geometry topics in an online format.
Teaching Mathematics Olympiad at School
Teaching, On-site & Online, 2026
I have been teaching mathematics olympiad since 2022. Most of my instruction has been conducted online, while I have also been specifically invited to teach at selected schools for olympiad training programs.