Welcome all!: 2025

Wednesday, 23 April 2025

2D1N City Square/Komtar/Midvalley Southkey

Booked from airbnb. S$89

Dinner at Palsaik Korean BBQ & Hotpot. About RM282

Movie at GSC Midvalley Southkey. RM12 per person

Breakfast at Roast & Coffee 三姐妹. RM114

Lunch at Hock Kee City Square 福气安康 RM119

Sunday, 20 April 2025

IMO 2025 Singapore Team

The 67th International Mathematical Olympiad 2025 (IMO 2025) will be held from 10 to 20 July 2025, and hosted by Sunshine Coast QLD, Australia.

The Singapore Team comprises the following students: (not in order of ranking)

Yang Yihan, RI Y5 (IMO 2024 Gold)

Zhao Yaoqi, HCI Y6 (IMO 2024 Silver)

Zhang Juntao, RI Y6 (IMO 2024 Silver)

Akash Thiagarajan, NUSH Y5 (IMO 2024 Silver)

Tey Yi Xiang, HCI Y4

Gao Zixiang, NUSH Y4

Congratulations!

Sunday, 30 March 2025

SLMath Talks by Lim Jeck

Vimeo Video: 5 Minute Talk

February 3rd, 2025

Vimeo Video: Sums of Algebraic Dilates

March 19th, 2025 (09:30 am to 10:30 am)

Abstract:

Given a real number λ and a finite set A of real numbers, how small can the size of the sum of dilate A + λ.A be in terms of |A|? If λ is transcendental, then |A + λ.A| grows superlinearly in |A|, whereas if λ is algebraic, then |A + λ.A| only grows linearly in |A|. There have been several works in recent years to prove optimal linear bounds in the algebraic case, but tight bounds were only known when λ is an algebraic integer or of the form (p/q)^{1/d}.

In this talk, we prove tight bounds for sums of arbitrarily many algebraic dilates |A + λ1.A + ... + λk.A|. We will discuss the main tools used in the proof, which include a Frieman-type structure theorem for sets with small sums of dilates, and a high-dimensional notion of density which we call "lattice density". Joint work with David Conlon.

Friday, 28 March 2025

Bukit Batok Town Park Little Guilin

Wednesday, 26 March 2025

NOI 2025 Results

Full Results NOI 2025

Top Contestants and Top Schools Results

Top 4 Contestants

1. Ang Wei Bin, NUSH

2. Zhao Yaoqi, HCI

3. Wu Hao, HCI

4. Wong Yi Kai, NUSH

Top Secondary School Students

1. Yong Siu Hei, NUSH

2. Ryker Xu Haohan, HCI

Top Female Medalists

1. Cao Leyi, RI

2. Chen Zixin, RGS

3. Guan Keer, HCI

4. Leong Sau Man Wendy, RI

Youngest Medalist

Li Yuansan, NUSH

Top Junior Colleges

1. NUSH

2. HCI

Top Secondary Schools

1. NUSH

2. HCI

Saturday, 22 March 2025

NUSH Family Gathering on 22 March

Thursday, 6 March 2025

France and UK Trip 3 to 21 Mar 2025

With Zixuan, Ivin

With Daniel Choo, Darren Wayne Lim

Met Eu-Shaun riding a bike

Trinity College

With Eric Li, Wang Yunrui

Arc De Triomphe

Eiffel Tower

Pompidou

Notre Dame

Famous pieces at the Louvre

Last visited them in 2016

Friday, 21 February 2025

Postdoc

Current CV

PhD: expected to be completed in Jun 2025

A postdoc (or "post-doc," "postdoctoral," or "postdoctoral research") fellowship is a training-focused position available to people who have earned a doctorate. Postdoc positions usually act as a stepping-stone between the student experience and the full-time professional experience.

Postdoc: expected to begin in Sep/Oct 2025

University of Oxford, UK, 2025 to 2026, Prof Mentor: Peter Keevash

University of Bonn, Germany, 2026 to 2028, Prof Mentor: Lisa Sauermann

Thursday, 13 February 2025

Visit to Chinatown Heritage Centre

Chinatown Heritage Centre

牛车水原貌馆

Chinatown Heritage Centre with Links

Gallery Guide

展馆导览

Friday, 7 February 2025

JB City Square and Nearby Shops Trip 6 Feb 2025

“三妹，大姐，二姐”

Sunday, 26 January 2025

The Simons Laufer Mathematical Sciences Institute (SLMath)

The Simons Laufer Mathematical Sciences Institute (SLMath), formerly known as the Mathematical Sciences Research Institute (MSRI), is a landmark of U.S. and world collaborative mathematical research. Located in the hills above the campus of the University of California, Berkeley, SLMath is an independent non-profit that has served the mathematical sciences community for 40 years.