Category Archives: math

What are integers

This morning over the breakfast table my family had a great conversation about integers It started when my youngest, L (5th grade), talked about his math test tomorrow. He said the whole chapter was easy and that he wasn’t worried … Continue reading

Posted in math, parenting | 4 Comments

Propellers with rolling shutter

I really loved Smarter Every Day’s cool video about propellers shot by digital video cameras: I especially like how he stuck with it over several years! I liked the explanation a lot about why the propellers take on such weird … Continue reading

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Best bingo board

My son is in the third grade and his math homework is to play games. The other night we played one that really got me thinking. Each player makes a 4×4 board and puts in any even number between 8 … Continue reading

Posted in fun, math, mathematica, parenting, Uncategorized | 9 Comments

Evolution of the traveling salesperson

The traveling salesperson problem is a relatively famous math/geometry/computer science problem. The version I’ll be talking about in this post is where the salesperson has to visit several points on a map, minimizing the travel distance. Repeating a point on … Continue reading

Posted in fun, math, mathematica | 11 Comments

Averages vs histograms

With graphics being so easy to add to documents these days, why don’t we show more histograms in place of the typical approach of representing very complicated data with one or two numbers (eg average and standard deviation)? Sure, if … Continue reading

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Visualizing eigenvectors

When I was in undergrad, I dutifully did all my linear algebra homework, not really understanding why. I figured, “if they want me to find a vector or two for a given matrix that satisfies M.v=lambda v , fine, I’ll do it.” … Continue reading

Posted in math, mathematica, physics, teaching, Uncategorized | 6 Comments

Fourier analysis for non-scientists

Yesterday I went on twitter to try to get some help on teaching Fourier analysis for my sound and music class: teaching fourier theory to non-sci-Ss. Goal: that it's possible (to find freqs). not-a-goal: teach slickest way to do the … Continue reading

Posted in math, mathematica, physics, teaching | 5 Comments