In patriotic duty bound, the Cambridge of Newton adhered to Newton's fluxions, to Newton's geometry, to the very text of Newton'...

losing streak

The Khan Academy has just got rid of its popular streak metric.  I woke up this morning in a somewhat ratty frame of mind and decided to soo...

I started doing exercises on the Khan Academy about 8 months ago as a way of taking my mind of crazymaking things I can do nothing about.  I...

Spoiled by the power of your best tools, you tend to shy away from messy calculations or long, case-by-case arguments unless they are abso...

useful & cool (dulce et utile)

I was playing around on Khan Academy (as one does).  As one does if one is unable to block out the world and write a book because unable to...

don't mention fried ants

(More from T W Körner, The Pleasures of Counting - a passage which makes the end of the book, on which a post currently waits in the drafts ...

Springer sale

Springer Verlag is having a sale on mathematics books through the end of July, offering "many essential mathematical titles" for h...

radar days

It is generally agreed that the quality of German radar was superior to that of British radar. German radar had been built by engineers, Bri...

Adam Smith overboard in Economist balloon debate

In an age where you need to be numerate to do almost anything else (from building bridges to conquering disease), governments anxiously comp...