Why the Strangest Sums in Math Are Actually Useful!

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What is the point of strange sums like 1+2+3+...=-1/12 or 1-1+1-1+...=1/2? These series diverge in the usual sense that we study in Calculus and use throughout most mathematics. But these alternative summation methods actually have physical meaning! Let's explore these weird sums and see why they are actually useful!

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00:00 Introduction
00:31 1-1+1-...=1/2
02:22 Fourier Problem
04:19 Sponsor Message
05:13 1+2+3+... = -1/12