One minus one plus one minus one

Discussing the brain-bending Grandi's Series and Thomson's Lamp - featuring Dr James Grime.

A little bit of extra footage from the very end of this interview at: http://youtu.be/TgGi1ls1X-0 (on Brady's own channel)

See our Zeno's Paradox video at http://youtu.be/u7Z9UnWOJNY

Check computerphile at http://www.youtube.com/computerphile