Mandai Bird Paradise

 

1st ECOPRO Combinatorial Week Workshop 2023

The 1st workshop ECOPRO (Extremal Combinatorics and Probability) Combinatorial Week is held at IBS. This workshop aims to get together experts and junior researchers to tackle challenging problems in extremal and probabilistic combinatorics, as well as problems in related fields.

Dates and venue: November 8 to 17, 2023, ECOPRO group, IBS headquarter, Daejeon, South Korea.

Workshop Problems 

Participants

1	Jozsef Balogh	University of Illinois Urbana-Champaign
2	Felix Clemen	Karlsruhe Institute of Technology
3	Jialin He	The Hong Kong University of Science and Technology
4	Yifan Jing	Oxford University
5	Jeck Lim	California Institute of Technology
6	Weichan Liu	Chinese Academy of Sciences
7	Haoran Luo	University of Illinois Urbana-Champaign
8	Sam Mattheus	University of California San Diego
9	Leticia Mattos	University of Illinois Urbana-Champaign
10	Minghui Ouyang	Peking University
11	Fei Peng	National University of Singapore
12	Eero Räty	Umeå University
13	Chong Shangguan	Shandong University
14	Shumin Sun	University of Warwick
15	Tuan Tran	University of Science and Technology of China
16	Ethan White	University of Illinois Urbana-Champaign
17	Michael Wigal	University of Illinois Urbana-Champaign
18	Menglong Zhang	Beijing Jiaotong University
19	Tao Zhang	Zhejiang Lab
20	Yuqi Zhao	Shandong University
21	Xiangxiang Zheng	Hamburg University

Meta Hacker Cup 2023 Round 3 Results

Round 3 Scoreboard

To advance to the Final Round, you must have placed amongst the top 25 contestants in this round.

Singapore's Top 200

Malacca Trip 3 to 6 November

Meta Hacker Cup 2023 Round 2 Results

Meta Hacker Cup 2023 Round 2 Home Page

Round 2 Scoreboard

Top 12

Singapore's Top 500 who will advance to Round 3

Schedule

2023 November/December School Holidays Online Maths Olympiad Training

This is posted on behalf of Ms Tang. 

Ms Tang graduated with a Masters in Mathematics and was a former university Maths lecturer. She helped her children prepare for Mathematical Olympiads. Their achievements were as follows: 

 • Gold, 3rd place in NMOS (National Mathematical Olympiad of Singapore) 

 • High Distinction, 2nd place in RIPMWC (Raffles Institution Primary Mathematics World Contest) 

 • Perfect score in PMWC in Hong Kong 

 • Platinum, 3rd place in SMOPS (Singapore Mathematical Olympiad for Primary School)

 • Perfect score in AMC 8 (American Mathematics Contest 8) 

 • High Distinction, Medalist in ICAS (International Competitions and Assessments for School)

 • Gold, 1st place in Singapore in SASMO (Singapore and Asian School Math Olympiad) 

 • Gold, 2nd place in SMO Junior 

She will be teaching the following classes in small groups (2 to 4 students). The lessons will be held on the online platform ZOOM. 

1. Math Olympiad Training for SMOPS/APMOPS 2024: 11 November to 9 December 2023 (Wed, Sat)

2. Math Olympiad Training for SMO Junior 2024: 5 November to 10 December 2023 (Sun)

 ************ 

If you are interested, please contact Ms Tang via WhatsApp 85758636.

Ho Chi Minh Trip 6 - 9 October

Cu Chi Tunnel

Mekong River

Ho Thy Ki Food Street

Lunch at Pho Vietnam

Everywhere Unbalanced Configurations by David Conlon and Jeck Lim

Source: Cheerful news in difficult times: David Conlon and Jeck Lim settled Kupitz’s planar discrepancy problem for pseudolines by Gil Kalai

Everywhere unbalanced configurations, by David Conlon and Jeck Lim

Some years ago I blogged about the following question of Yaakov Kupitz

What is the smallest number C such that for every configuration of n points in the plane there is a line containing two or more points from the configuration for which the difference between the number of points on the two sides of the line is at most C?

Kupitz asked, in particular, if every point set has a line through at least two of its points which is balanced in the sense that the number of points on either side differ by at most some fixed constant c. David Conlon and Jeck Lim showed that if you allow pseudolines rather than lines, the answer is no!

Kupitz’s question extends to pseudolines where it can be formulated using the method of  allowable sequence of permutations introduced by Goodman in Pollack. The best known upper bound C = O(log log n) was proved by Rom Pinchasi and Rom’s proof uses the method of allowable sequence of permutations and applies to pseudolines. Conlon and Lim’s proof shows that for pseudolines, C = Ω(log log n) .

Congratulations David and Jeck!

~~~~~~

Some papers by Lim Jeck on ArXiv

2023 Alibaba Global Math Competition Results

 

Prize: US$5000 and medal

Dream Cruise Trip 13 - 15 September

 

Meta Hacker Cup 2023

Meta Hacker Cup 2023 Schedule 

Meta Hacker Cup is back! We’re excited to announce our schedule for our 2023 season, kicking off on September 22nd! 

Practice Round: Fri. Sept 22nd, 10am Pacific — Mon. Sep. 25th, 10am Pacific (72 hours)

Round 1: Sat. Oct. 7th, 10am — 1pm Pacific (3 hours) 

Round 2: Sat. Oct. 21th, 10am — 1pm Pacific (3 hours) 

Round 3: Sat. Nov. 4th, 10am — 1pm Pacific (3 hours) 

Finals: December 9th 2023 (Online) 

*While optional, we recommend you participate in the Practice Round to familiarize yourself with our submission system before Round 1, when time will be at a premium. To compete, you can register at Meta Coding Competitions at any time between now and September 25th.

You can expect familiar prizes including T-Shirts, Elite T-Shirts, and cash prizes for finalists. We’ll announce more prize details closer to Round 2.

We look forward to seeing you on the Practice Round’s scoreboard!

IOI 2023 Singapore Team Results

IOI 2023 Live Scoreboard

Full Results

Singapore Team Results

Gold - Tia Shi Wei, NUSH Year 6

Silver - James Sng, NUSH Year 6

Silver - Yaw Chur Zhe, HCI Year 5

Bronze - Jamie Lim, NUSH Year 6

SMO 2023 Top 30 Results

 Individual Award (Junior Section)

Top 30	School	Name
1	HWA CHONG INSTITUTION	RYKER XU HAOHAN
2	RAFFLES INSTITUTION	BRIAN XIAO BOYANG
2	RAFFLES INSTITUTION	WANG YI
4	HWA CHONG INSTITUTION	GAO YUXIANG LUCAS
4	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	ZHOU SHIHONG
6	HWA CHONG INSTITUTION	CHEN JIAQI
7	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	LIM ZU WAN
7	RAFFLES INSTITUTION	SHI TIANLE
9	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	YONG SIU HEI
10	RAFFLES INSTITUTION	SEAH BING XUAN AARON
11	RAFFLES INSTITUTION	XIA JIAHAO
12	RAFFLES INSTITUTION	LI SIXING
13	RAFFLES INSTITUTION	LOU YEHUI
13	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	PARIN SHARMA
13	HWA CHONG INSTITUTION	TEY YI XIANG
16	RAFFLES INSTITUTION	MAO RUIYANG
17	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	CHONG YU TENG, ADEN
18	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	GAO ZIXIANG
19	RAFFLES INSTITUTION	ZHANG CHANGJUN
19	NANYANG GIRLS’ HIGH SCHOOL	ZHANG JIAHAN
21	RAFFLES INSTITUTION	XUE JINZE
22	RAFFLES INSTITUTION	WANG PENGRUI
22	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	LIU JIAHAO
24	RAFFLES INSTITUTION	GU SIMIAO
24	HWA CHONG INSTITUTION	ZHEN MINGYUAN
24	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	WONG NAIJIE
24	ANGLO-CHINESE SCHOOL (INDEPENDENT)	WANG YAN LI, LUKE
24	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	TAN YONG XIN, JERYOAN
29	HWA CHONG INSTITUTION	FAN WENDI
29	RAFFLES INSTITUTION	FANG KEYI
29	RAFFLES GIRLS’ SCHOOL (SECONDARY)	XU FANQI
29	HWA CHONG INSTITUTION	WANG RYAN LI

Individual Award (Senior Section)

Top 30	School	Name
1	RAFFLES INSTITUTION	ZHANG JUNTAO
2	RAFFLES INSTITUTION	YANG YIHAN
3	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	WANG JIAYU
4	RAFFLES INSTITUTION	SUN WENYUAN
5	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	DING CHENGHAO
6	RAFFLES INSTITUTION	MEN JIAHE
7	RAFFLES INSTITUTION	MARTIN JOE PREM KUMAR
8	HWA CHONG INSTITUTION	ZHAO YAOQI
8	RAFFLES GIRLS’ SCHOOL (SECONDARY)	LEONG SAU MAN WENDY (LIANG XIUWEN)
8	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	AKASH THIAGARAJAN
8	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	RAPHAEL TENG ZHI XIANG
8	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	NGUYEN KHANH VY
8	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	LIANG CHENXI
14	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	CHEN RUI AN
14	HWA CHONG INSTITUTION	LOO WAYHAN BRIAN
16	RAFFLES INSTITUTION	WANG JIANJIA
16	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	MISHRA ARNAB
16	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	OON HAN
19	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	WU TIANHAO VINCENT
19	RAFFLES INSTITUTION	LAN SHUHENG JERRY
19	RAFFLES INSTITUTION	LIU TOMAS
22	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	CHANDRANSHU NANDA
22	ST JOSEPH’S INSTITUTION	PHAM LUAN KHANG
24	HWA CHONG INSTITUTION	KONG JIA LE
24	RAFFLES INSTITUTION	CLEMENT YAP KUAN HONG
26	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	WANG YUQI
26	ANGLO-CHINESE SCHOOL (BARKER ROAD)	VINAYAK SAHA
26	FUHUA SECONDARY SCHOOL	PHAN TRUNG KIET
29	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	SIEW JING HONG
30	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	LIANG JINGZHANG
30	COMMONWEALTH SECONDARY SCHOOL	MICHELLE AURELIA YUDIANTO
30	RAFFLES INSTITUTION	WONG E JEH

Individual Award (Open Section)

Top 30	School	Name
1	HWA CHONG INSTITUTION	GABRIEL GOH HAO XIANG
2	RAFFLES INSTITUTION	PEH YAN XI
3	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	AKASH THIAGARAJAN
4	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	EDDEN CHEW KEYN-HANTZ
5	RAFFLES INSTITUTION	ZHANG JUNTAO
6	HWA CHONG INSTITUTION	CHENG WENHAO
6	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	DREW MICHAEL TERREN RAMIREZ
8	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	MARIO TANIJAYA
9	HWA CHONG INSTITUTION	ZHAO YAOQI
9	RAFFLES INSTITUTION	YU HANZHANG
9	RAFFLES INSTITUTION	YANG YIHAN
9	RAFFLES INSTITUTION	TRAN DOAN DUY PHUC
13	RAFFLES INSTITUTION	BRIAN XIAO BOYANG
13	HWA CHONG INSTITUTION	KONG U HAM
15	HWA CHONG INSTITUTION	WU XINYUE
15	HWA CHONG INSTITUTION	LE DUC MINH
15	RAFFLES INSTITUTION	LV JINDONG
18	RAFFLES INSTITUTION	KANG TAEYOUNG
19	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	WANG JIAYU
19	RAFFLES INSTITUTION	LIU ZIHAN
21	RAFFLES INSTITUTION	SUN YU CHIEH
21	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	CHAN CHEE HOW RYAN
23	HWA CHONG INSTITUTION	XU ZIYU
24	RAFFLES INSTITUTION	SUN WENYUAN
24	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	DING CHENGHAO
26	HWA CHONG INSTITUTION	ZHOU HENGZHI
26	NUS HIGH SCHOOL OF MATHEMATICS AND SCIENCE	RYAN SUWANDI
26	HWA CHONG INSTITUTION	RYKER XU HAOHAN
29	NANYANG JUNIOR COLLEGE	HUANG YIXUAN
29	RAFFLES INSTITUTION	MEN JIAHE