I am a first-year undergraduate student at the National University of Singapore.
Interested in combinatorics.
Email: hbs@u.nus.edu — I welcome any questions/comments about my work.
Papers:
Two product formulas for counting successive vertex orderings, submitted.
Equality cases for a bound on the chromatic number, with Joel Tan Junyao and Zhang Xiaorui, arXiv preprint (2019), no intention to submit.
Miscellany:
Ranked 7th in Don Knuth's Bank of San Serriffe, which tracks the number of bugs people have found in Knuth's work since 2006.
My name shows up in exercises 7.2.2.1–425 and 7.2.2.3–291 of The Art of Computer Programming, for this Masyu puzzle solution and this graph animation respectively.
Sometimes, I post to
MathOverflow and
Math StackExchange,
though I mostly just post comments.
Selected answers:
Gosper's golden ratio identity,
Stirling sum positivity, and
graceful windmill labelings.
Sometimes, I post comments on the On-Line Encyclopedia of Integer Sequences (OEIS); see for example sequences A275888 and A001581.
Here are some things I've written in the past:
