e to the pi i for dummies

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For this Christmas video the Mathologer sets out to explain Euler's identity e to the pi i = -1, the most beautiful identity in math to our clueless friend Homer Simpson. Very challenging to get this right since Homer knows close to no math!

Here are a couple of other nice videos on Euler's identity that you may want to check out:

And for those of you who enjoy some mathematical challenges here is your homework assignment on Euler's identity:
1. How much money does Homer have after Pi years if interest is compounded continuously?
2. How much money does Homer have after an imaginary Pi number of years?
3. As we've seen when you let m go to infinity the function (1+x/m)^m turns into the exponential function. In fact, it turns into the infinite series expansion of the exponential function that we used in our previous video. Can you explain why?

If you own Mathematica you can play with this Mathematica notebook that I put together for this video

Thank you very much to Danil Dmitriev the official Mathologer translator for Russian for his subtitles.

Merry Christmas!
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i: Be rational!
π: Get real!
e: Stop fighting, you're gonna make me negative!

zavionw.
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I feel like I'm cheating on numberphile but this guy is good

headshock
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If Euler's spirit were around, he would be so very, very pleased with this explanation!! Euler was known for simplified, and many, theoretical explanations for any given math "puzzle" (like e). He was not arrogant, his explanations were not configured to be hidden or difficult. He wanted everyone to enjoy/understand/be in awe of a given math puzzle - what this explanation does for this viewer. THANK YOU!!

walterrussell
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I remember seeing this video 3 years ago when I really was getting into maths and science. I could never make sense of how this could possibly work. What's nice about this video is that now I'm studying chemical physics and have the maths to fully understand this. Kind of nostalgic looking back on problems that I once was unable to grasp.

conordorney
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Thanks I now feel more stupid than Homer.

MilanMilan
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I seriously doubt Homer would be able to understand this.

MaxDamage
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You would have lost Homer @ 0:11 after you said "Pie"

JamesAda
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“This guide can be understood by anyone that knows how to do addition, subtraction, multiplication and division!”

*Uses exponents, graphs, imaginary numbers, funcions...*

meh
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I like that quote "Really awful to the power of awful"

mdnpascual
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after so many years in my engineering life, first time to see what it means to multiply two complex number in graphical explanation. thanks.

YilmazDurmaz
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"really awful to the power of awful"

mattsoutback
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this is probably the best, most intuitive explanation I have seen of Euller's identity. Really well done!

GyanPratapSingh
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This was the best explanation for e^(pi i) = -1 I've ever seen, hands down.

DDranks
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Different school subjects' levels taught by youtubers:
Anything else: middle school
Math: *University*

arttukettunen
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It took me more than a semester of teaching myself calculus, geometry, trigonometry and algebra but I finally understood a "for dummies" mathologer video :D

alejrandom
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Thank you. I watched this purely for nostalgic reasons. I forgot how much I enjoyed studying mathematics forty years ago.

indigogolf
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When m goes to infinity, it comes closer and closer to a Pokemon ball

MrHandsomeStudios
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EXCELLENT! WONDERFUL! Perfect! I have run out of superlatives.

No distracting, annoying, background "music." No superfluous sound effects. No constant, senseless, movement of the presenter all over the frame. No distracting, constant, hand and arm motion.

Excellent presentation. Excellent graphics. Excellent explanation. Excellent diction. Other math(s) and science videos on YouTube pale in comparison.

Thank you very much!

Jon

yanwo
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I never never ever thought that I might see as strong visual proof for this amazing formula as this guy's👏🏻👏🏻👏🏻 this is so 100% enough

math
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This video is so awesome, I bursted out in tears of joy.

mohasandras