Minus times a minus is a plus

My response to the blog wars about multiplying negative numbers. Mostly inspired by Eric’s comment on Mike Croucher’s Walking Randomly.

Big image, links to a PDF (of vector goodness).

I wanted to put the Inkscsape SVG source inside the PNG image. But it turns out wordpress.com “optimises” the image and means my klever hack doesn’t work. Bad wordpress.com.