As tome says, no the article isn't mixing anything up. So why are you insisting that it is? You seem annoyed that the original creator of the formula used a sy

As tome says, no the article isn't mixing anything up. So why are you insisting that it is? You seem annoyed that the original creator of the formula used a symbol that you wouldn't have expected. So that's your beef. Not with this article, or any assumptions of "mixing up." As for why the original creator used "ß", I don't know, but perhaps it related to the "S" in sharability. Or he's not a mathematician and he liked the look.