The world’s best map projection
As is well known, you can’t squash the surface of a sphere (or of a hemisphere) flat without either tearing…
Let’s hear it for Logo (3)
Logo is of course known for its turtle graphics, and such is the appeal that there are now turtle graphics…
Let’s hear it for Logo! (2)
Continuing my re-discovery of Logo, I thought I’d try to implement a backtracking solution to finding a Hamiltonian cycle in…
Let’s hear it for Logo!
Recently I had the occasion of helping my autistic son with some elementary mathematics. He’s very averse to writing, but…
Approximating the sum of an infinite series (3)
In the last post I looked at Aitken’s delta-squared process, and showed its applicability to summing some alternating series. But…
Approximating the sum of an infinite series (2)
Before we begin, some basic definitions. Suppose is a sequence that converges to a limit . We say that the…
Approximating the sum of an infinite series
I started thing about this as I was preparing some material on the use of Matlab for teaching engineering mathematics…
Typesetting music
Recently I’ve been typesetting a little music. My notational needs are simple: mostly single melodic lines, occasional chords or multiple…
The derivative of sin(x)
We know that we can use the limit definition to compute the derivative of “from first principles”. And…
Tuning and temperament (5): Meantone and the syntonic comma
The Pythagorean comma may be considered as the difference in two ways of tuning 84 semitones: either as 12 fifths,…
