threelonmusketeers@sh.itjust.works to

Unexpected FactorialEnglish · 6 months ago

UnRelatedBurner@sh.itjust.works is positively ancient

sh.itjust.works

5

57

UnRelatedBurner@sh.itjust.works is positively ancient

sh.itjust.works

threelonmusketeers@sh.itjust.works to

Unexpected FactorialEnglish · 6 months ago

5

https://sh.itjust.works/comment/11087699

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gimpchrist @lemmy.world
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6 months ago
But when I say pi is just a little symbol thingy all the math people got really fucking mad at me the other day

Unexpected Factorial

unexpectedfactorial

You are not logged in. However you can subscribe from another Fediverse account, for example Lemmy or Mastodon. To do this, paste the following into the search field of your instance: !unexpectedfactorial@sopuli.xyz

When you use an exclamation mark with a number, you’re actually implying it’s not a normal number any more. It’s a factorial!

Ok, so how does this work?

5!=1×2×3×4×5=120

6!=720

These numbers get really large. For example:

15!≈1.3×10^12

So, next time you see a headline with 2000! in it, you’ll know what to expect.

There are also double factorials (n!!) and iterated factorials (n!)!, and they aren’t the same thing. Just add more exclamation marks and you get multifactorial. Check wikipedia to see how spicy it gets.

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