A good reason to learn complex analysis: to prove that -10 = -10

Learned a lot from this tweet today:

And the lecture is on complex multiplication and proving -10 = -10. #mitmath #AprilsFool

— John Urschel (@JohnCUrschel) April 1, 2016

So much, actually, that we had to go through it when my son came home from school . . .

First we talked about what multiplying by i does – you might even argue this is more important than knowing that -10 = -10. Who can really say, though?

 

Having learned a bit about what multiplying by i does geometrically, it was time for the big news of the day:

 

Ha ha – pretty much the perfect little math project for the end of the week 🙂

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