my maths articles with bad english and better format.
recent blog posts
why we should use gaussian rounding
a student asked me how much -3.5 is, rounded to the nearest unit. while itself being a straightforward question, the implication is quite profound. on what base our traditional rounding strategy is based? what's more, is it good? this passage will try to answer these questions.
summation by part and dirichlet test
an alternative approach to prove integral by part and hence abel's summation. the test itself is as straightforward as it can be, but plays a vital rule in the further studies. that is why every mathematically literate person should know (:
head or tail
some not-so-useful advices on bets on coins. the result can be a bit out of expectation of some, but the rationale is really conventional for a finance practitioner. tl;dr riding a tide is better than playing cool.
technical details of the blog
a wordy introduction to the making of this blog, from scratch. while trivial enough, it is interesting to build such a shabby site with so many incorrectly used technologies.