∫ntegrabℓε ∂iﬀerentiαℓs · unorganised notes, code, and writings of random topics

Twelvefold of combinatorics

April 28, 2019 blog math

Recently I come across the term “Twelvefold way” of combinatorics. I wish I knew the term earlier as I studied quite many of those in the graduate schools and collected “recipes” for them. I always thought of them as some cases of urn models of George Pólya but they indeed... [more]

The Naked Presenter

Garr Reynolds / 2011

April 23, 2019 book

TLDR: A book on presentation. Not on slides, but on how to give a presentation in person, and how to engage the audience to the topic [more]

Karatsuba method of multiplication

April 18, 2019 blog math

This is a way of doing multiplication of large numbers that I learned today. It allows the multiplication below \(O(n^2)\) complexity. [more]

Badass: Making Users Awesome

Kathy Sierra / 2015

April 17, 2019 book

This book is about empowering users. Not specific to any kind of product, but arguing that whether the users feel they have some achievements to talk about is the key to whether they are loyal to a product. [more]

Team Geek

Fitzpatrick and Collins-Sussman / 2012

April 17, 2019 book

TLDR: A book summarizing a lot of common sense on working in an engineering organization. It proposed the concept “HRT” – humble, respect, trust – as the general rule for dealing with people, whether they are coworkers, managers, customers. [more]