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

Convex optimization with Lagrangian function and Support Vector Machine

August 4, 2019 blog math

This is a summary of the math behind the support vector machine. Start from the constrained optimization problem, solving one using Lagrangian function, and application to support vector machine. [more]

Git, mercurial, and synchronized repositories

July 20, 2019 blog system

The first version control system I used was CSV, then I moved to Subversion as everyone else does. Later, people start to look for server-less solutions and I used Mercurial. I even made a cheatsheet about it that is now the top result on Google for searching “mercurial cheatsheet”. But... [more]

Jeong et al (2014) mTCP - A highly scalable user-level TCP stack for multicore systems

June 15, 2019 paper

A paper addresses the inefficiency of TCP in Linux kernel. [more]

Public DNS list

May 16, 2019 blog system

Just in case they are useful. Some of these I never heard of. [more]

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]