yetAnotherUser

Makes sense though. The complex Riemann-Zeta function (Zeta(x) = sum from 1 to infinity of 1/n^x) only converges for Re(x) > 1, else it is infinite. We can use analytic continuation - which I understand as extending the function such that it remains holomorphic (basically continuous but in the complex numbers and for some reason well-defined) and find the value of Zeta(-1) that way. The value of Zeta(-1) when viewed this way is -1/12. It's not really saying the sum of all natural numbers is equal to -1/12. It's really just a mathematical trick, just like: lim (x -> 0) x/x = 1 but this doesn't mean 0/0 = 1.

Both pics are magnetic implants, the first is used on the only other language article:

https://commons.wikimedia.org/wiki/File:Implantation_eines_zylindrischen_Magnet.png

Biohacker Mrln implants a commercially available biomagnet

Based on the other images, the side of your hand seems to be a popular location for magnets too:

Also, the latter image is probably the result of the first operation image (in my other comment) because the subtitle says:

Multiple subdermal magnets implanted by bioacker Mrln [sic]

But what is a little weird is that the magnet seems to be on the “wrong” side. I think the first operation image is just misleading.

Edit:

The upper image (in this comment) is also by Mrln. Apparently they installed a lot of magnets.

There’s enough people surgically implanting small magnets into their fingertips for a surprisingly detailed Wikipedia article to be a thing:

https://en.wikipedia.org/wiki/Magnetic_implant

Also some interesting, mostly¹ SFW but not for the faint of heart, images of the DIY surgery:

::: spoiler Images (Note: the images are unrelated, this isn’t a before and after) :::

¹ meaning you will probably not get in trouble in most companies, there’s a little blood and that’s it

What a nice company, providing its employees with free product samples!

To elaborate, it’s really easy to forge “regular” coins and really attractive to forge high value coins.

For example, the 1 British Pound coin was, before the redesign, widely forged:

As of March 2014 there were an estimated 1,553 million of the original nickel-brass coins in circulation,[6] of which the Royal Mint estimated in 2014 that just over 3% were counterfeit.

https://en.wikipedia.org/wiki/One_pound_coin

(Note for any languages that use the comma as a decimal separator: 1,553 million is referring to 1.5 billion)