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]

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]

Artificial Neural Network using only numpy

March 20, 2019 blog code

I know there are tensorflow, pytorch, kera and a whole bunch of other libraries out there but I need something that can work on Termux but no success (at least no longer after Python 3.7 upgrade). But after reading again the textbook on how a neural network operates, it doesn’t... [more]