Today I learned about Booth’s multiplication algorithm. I will have to circle back and read closely.

# Category Archives: Mathematics

# Approximation of a square wave

I was reading Fast Fourier Transforms explained and I wanted to play along…

This code uses sine waves to approximate a square wave. The first is to the 11th harmonic, the second to the 9,999th…

# Open Logic Project

See Open Logic Project Builds for a 1,000 page book on math fundamentals. From the home page:

The Open Logic Project is a collection of teaching materials on mathematical logic aimed at a non-mathematical audience, intended for use in advanced logic courses as taught in many philosophy departments. It is open-source: you can download the LaTeX code. It is open: you’re free to change it whichever way you like, and share your changes. It is collaborative: a team of people is working on it, using the GitHub platform, and we welcome contributions and feedback. And it is written with configurability in mind.

And if you like the Open Logic Project you might also like The Stacks project, an open source textbook and reference work on algebraic geometry.

# Probability and Statistics Cookbook

This via HN today: Probability and Statistics Cookbook.

# Intervals

I’m watching Unit II: Lec 9 | MIT Calculus Revisited: Single Variable Calculus and my mate Herb says that he uses the word “on” the closed interval [a,b] and “in” the open interval (a,b). Thanks Herb. :)

# Time-weighted averages

This via HN today: What time-weighted averages are and why you should care. Looks really interesting! Wish I had time to read it closely…

# How you average numbers matters

This on lobste.rs today: How you average numbers matters.

# Data Visualization With Matplotlib and Seaborn

I was referred to Data Visualization With Matplotlib and Seaborn on #lobsters today.

# How the Axiom of Choice Gives Sizeless Sets

How the Axiom of Choice Gives Sizeless Sets | Infinite Series. “The size of the set can’t be zero and it can’t be non zero.” Figures.

# What Gödel Discovered

I love a little pop Gödel: What Gödel Discovered.