Piet Hein

          To Martin Gardner
"Lines that are parallel
meet at Infinity!"
Euclid repeatedly,
heatedly,
    urged
Until he died.
and so reached that vicinity:
in it he
found that the damned things
    diverged.

*Poem quoted from the book Imaginary Numbers
*Piet Hein

More like this

One of the things required for the tenure review is a full and up-to-date curriculum vitae. Having spent an inordinate amount of time updating and re-formatting my CV, it seems a shame not to make more use of it than that, so I might as well recycle it into a blog post (after stripping out my home…
While waiting for I was innocently browsing around the net looking at elementary math curriculums. I want to be able to teach my kids some fun math, just like my dad did with me when I was a kid. So I was browsing around, looking at different ways of teaching math, trying to find fun stuff. In the…
Martin Gardner has died at the age of 95. He was a prolific writer in three different areas: mathematics, magic and debunking pseudoscience. Since those happen to be three of my favorite things in life you can imagine how big a fan I was of his writing. His book Puzzles From Other Worlds made a…
Letters and numbers are often mentally grouped together; they're both simple sets of symbols that are the building blocks for much more complex concepts, and mastering their relationships is a cornerstone of early education. But while illiteracy becomes a major social stigma almost immediately…

don't you know that how they map the plane into the sphere, by assuming all lines "converge" to "infinity", which is a point.