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Monthly Archives: September 2011
The decadic metric
Continuing my series of posts exploring the decadic numbers… in my previous post, I explained that we will define a new “size function”, or metric, different from the usual “absolute value”, and written . Two numbers will be “close to” … Continue reading
Posted in arithmetic, number theory, pattern
Tagged decadic, distance, integers, metric, number line, numbers, padic, soup
5 Comments
What does “close to” mean?
Continuing from last time, consider the (normal, decimal) number with an infinite number of 3’s after the decimal point. Now, you probably know that this represents . But why? How do we define what such an infinite sequence of digits … Continue reading
Posted in convergence, number theory
Tagged absolute value, Cauchy, distance, limit, sequence
3 Comments
An invitation to a funny number system
Consider the equation Solving this equation is no sweat, right? Let’s do it. First, we subtract from both sides: Now we can factor an out of the left side: Now, if the product of two things is zero, one of … Continue reading
A curiosity
From Futility Closet, a fun blog of random tidbits I enjoy reading, comes the following curious sequence of equations, attributed to J.A.H. Hunter: I managed to extend this pattern for a few more digits before I got bored. Does it … Continue reading
Posted in arithmetic, modular arithmetic, number theory, pattern
20 Comments
Some words about Post without words #2
My previous post displayed this picture: As Yuriy Kashnikov guessed, I made this picture using diagrams, a Haskell library I am developing for creating images like this. (You can see the source code for this picture here.) If you haven’t … Continue reading
Posted in counting, pascal's triangle, pattern, pictures
Tagged binomial coefficients, diagram, Hasse, Pascal, subset
4 Comments