We live quite remote, not Yukon remote, but enough that you don't want to run out of milk because driving to the nearest shop for more will double the cost per litre. Amenities like a cash-point, gas-station, or chinese-takeaway are much more remote. When we go visit Pat the Salt's old place in Tramore, it's different. The library, for one example, is so close you could hit it with a tennis-ball thrown from the garden. We were in town [in our bib-overalls and shedding straw] earlier in June and I popped up to the library to see what they had for non-fiction / science.
Fair enough that most of the books in a small town library are General Fiction, that's what normal people go to browse the collection. It was kinda woeful that there was just over one shelf covering the whole of DeweyDecimal 500, that includes 510 Mathematics 520 Astronomy 530 Physics 540 Chemistry 550 Earth sciences and geology 560 Fossils and prehistoric life 570 Biology 580 Botany 590 Zoology. Compared to 10 linear metres labelled CRIME. What is this obsession among Citizens with over-stepping the bounds of the law?
BUT, I did find another book Shape: The Hidden Geometry of Information, Biology, Strategy, Democracy, and Everything Else [2021] by Jordan Ellenberg. to carry on from How Not to be Wrong [bloborecent]. Shape is more recent and also 400+ pages but the font is bigger.
Another book I've just finished suggests that kids can be quite different in their learning styles and good teachers run through a variety of approaches to new material hoping / expecting that some kids will 'get it' in one way, while another bunch will prefer a different perspective. Really great teachers will stop their gallop and pause to ensure that the lesson is learned. Ellenberg confesses early in this book that he never got geometry, preferring an algebraic approach if that was available and appropriate. Euclid, like all the ancient Greek mathematicians / philosophers were embedded in geometrical models: if you couldn't scratch it in the dust, it wasn't real.
I was 'good at maths' and able to get to grips with arithmetic, geometry, algebra, even calculus as they came up in the curriculum. Even outside of class, I would riffle through puzzle books by Martin Gardner and others. One standard set of problems was "Series": being presented with a list of numbers and asked to- 2, 4, 6, 8, . . .; . . .
- 10, 7, 4, 1, . . .; . . .
- 1, 4, 9, 16, 25, 36, . . . ; . . .
The first two Series are changing by a fixed amount [+2 and -3] to generate the next number. But the 3rd one has gaps of 3 then 5 then 7 . . . between successive numbers. Those differences are changing by a fixed amount; maybe we called it a second order series back in the day?Having been drilled in my times-tables, I recognised that third Series as being of square numbers. But one day as a tween I had an Aha! to twig that they were called Square Numbers because you can draw them in the dirt as squares. And further, that was the reason why adding successive odd numbers to 1 [as in the diagram above R] generated the series of Square Numbers.
Because Ellenberg thinks better in the abstractions of algebra, he has had to struggle to make sense of the world through Shape. That struggle has compelled him to think through each problem clearly and that really helps him to explain the issue and solution cleanly.
Footnote on p311 resonated with moi-le-plongeur. "A disagreeable feature of the Erdös legend: it encourages some mathematicians to see domestic work as somehow beneath our station and beyond our capabilities at once. And yet we eat food and wear clean shirts. Fact: thinking about mathematics while washing dishes is good for both mathematiciansand, if your are prone to reveries as most mathematiciansare, the dishes".
I like his throw-away jokes, not always confined to the [copious] foot-notes. "A sporting event is not just an algorithm; it may also be intended to provide entertainment, generate tax revenue, narcotize a seething populace etc. -- but an algorithm is one of the things that it is". He discusses why a match between two players as best of three games [or 20 overs in cricket , or 5 sets of six games in tennis, or playing a league of other teams both Home and Away in soccer] is more likely to find the better players than the result of a single play. There is also a desperate, depressing chapter about how gerrymandering [whc prev] can be really effective in birthing a totalitarian state.









