This post is shameless promotion of what I think is a great site - Khan Academy. If you don't like shameless promotions, you should stop reading now. The site features a whole set of instructional videos along with a good amount of exercises. All topics are what I consider to be some basic skills of mathematics. Not because they are simple or easy, but because they are fundamental for you to build upon.It brings you all the way from addition (yep, I am not kidding) through calculus, differential equations and probability. A total of more than 2400 videos, including videos on other topics such as chemistry and finance.

Continue reading...Tuesday, July 19, 2011

I have just finished reading Prime Obsession by John Derbyshire. A casual mathematics book which I will pass my thoughts and recommendations about this book in this post.Prime Obsession is a book about the history surrounding Bernhard Riemann and the Riemann Hypothesis. A hypothesis, which is more than 150 years, and still haven't been neither proved nor falsified. The Riemann Hypothesis tells us a lot about the Riemann zeta function and how it is linked to the distribution of primes. This link is the turning point for the whole book.The book covers two aspects of the Riemann hypothesis...

Continue reading...Wednesday, March 16, 2011

A few weeks ago I stumbled on a few videos on YouTube showing me something valuable. It is three videos telling about derivatives, one of the fundamentals of calculus.I started the post saying that the videos teach us about derivatives. But what is more important than telling about derivatives. It teaches us to pay attention to definitions. It starts out with the definition of the difference quotient and showing that if you understand that, you can also derive the formulas we use in practice when calculating the derivatives of a function.

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Wednesday, July 27, 2011

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