### The Gini coefficient and income inequality in Australia

According to Australia’s national broadcasting network, the ABC, inequality is increasing. This claim has been refuted by several academics. Now…

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# Numbers and Shapes

### The Gini coefficient and income inequality in Australia

### The world’s best map projection

### Let’s hear it for Logo (3)

### Let’s hear it for Logo! (2)

### Let’s hear it for Logo!

### Approximating the sum of an infinite series (3)

### Approximating the sum of an infinite series (2)

### Approximating the sum of an infinite series

### Typesetting music

### The derivative of sin(x)

Various things, mostly mathematical

According to Australia’s national broadcasting network, the ABC, inequality is increasing. This claim has been refuted by several academics. Now…

As is well known, you can’t squash the surface of a sphere (or of a hemisphere) flat without either tearing…

Logo is of course known for its turtle graphics, and such is the appeal that there are now turtle graphics…

Continuing my re-discovery of Logo, I thought I’d try to implement a backtracking solution to finding a Hamiltonian cycle in…

Recently I had the occasion of helping my autistic son with some elementary mathematics. He’s very averse to writing, but…

In the last post I looked at Aitken’s delta-squared process, and showed its applicability to summing some alternating series. But…

Before we begin, some basic definitions. Suppose is a sequence that converges to a limit . We say that the…

I started thing about this as I was preparing some material on the use of Matlab for teaching engineering mathematics…

Recently I’ve been typesetting a little music. My notational needs are simple: mostly single melodic lines, occasional chords or multiple…

We know that we can use the limit definition to compute the derivative of “from first principles”. And…