You don't need much beyond basic calculus. Most suffer from some mental block they got installed at a young age akin those that say "I'm bad at math" because their teacher sucked. Dive in and you won't regret it.
I feel stats is has a somewhat similar effect even among those with math education. Several friends who have a degree in math recoil at the first mention of stats concepts.
It is actually even fashionable in non-english countries. Declaring "I'm bad at [my native language], I only use english anyway" makes you a better person somehow. And it's not rare in other areas either – in post-truth world it's trendy not to know things.
Not that he was bad at German, necessarily, but that it was overly complex vs English, so he and his significant other even used English at home when they both didn't have to.
This is just one example, of course.
I was actually surprised to hear him say that (though it may have been to thwart my attempts at speaking some German when we had a meeting. I don't know any German,lol).
In my country it's especially fashionable not to know a native language for a people in tech. "It's impossible to talk about tech anyway in native languages, so we all should use english anyway in future" is very common. I tried to fight with it localizing/translating software for many years, but I've given up for now.
I can learn math fairly well if I have the right written material and the right direction. However, I do not retain math skills: without active practice, I revert back to "how do fractions work?"
For example, I did extremely well in a college algebra course that was partially online (combined with Khan Academy to catch up). I could do my tests perfectly in pen, much to the amusement of the assistants. I could make connections and see the implications and applications of the math. Roughly three to six months later, I was back to forgetting fractions.
I can't learn these things over time, but I can learn them all at once. I'm collecting resources for my next math adventure.
Would you be OK with elaborating on this a bit more?
The injury was diagnosed via SPECT scan. Two of them: one after mental activity, one after physical relaxation. This also revealed that my brain relaxes with mental activity, and "lights up" with physical relaxation.
I always knew there was "something" wrong with me, so I jumped at the opportunity to get a brain scan. The clinic was a little suspect in that they claimed to be able to diagnose mental health issues via the scan, but they combined the scan with more traditional evaluations.
To quote pg, many conversations on the Internet:
Person 1: ∃x P(x)
Person 2: -(∀x P(x))!