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Physically Incorrect

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Physically Incorrect is a blog dedicated to entertaining and insightful technical posts on physics, mathematics and everything in-between. Written by a physics PhD, the blog explores a different topic every week, often from a technical viewpoint (equation

Recent Posts Tagged With 'mathematics'

• Mathematics Puzzle: Climbing up a Staircase

  Posted on Monday March 10th, 2008 at 06:18 in mathematics, puzzles

  Here’s a short little puzzle I was asked at a job interview some time ago. Suppose you have a staircase with n steps. You wish to climb up the staircase. At each point you either climb up one st...

• Mathematics Puzzle: Adding Random Numbers

  Posted on Thursday February 28th, 2008 at 16:49 in mathematics, puzzles

  I have no intention of turning this blog into a math blog, but every now and then I run into interesting mathematical puzzles. My two favorite fields are combinatorics and probability, and this puzzle...

• Google’s PageRank (Sort of) Explained

  Posted on Friday December 21st, 2007 at 14:50 in algorithm, algorithms, computer science, eigenvalue, linear algebra, mathematics, matrix, pagerank

  In this post we’ll take a look at the algorithm which defines Google’s pagerank (PR) analysis. A webpage’s PR is a number between 0 and 10 that Google uses to estimate the usefulness...