• 69 Posts
  • 123 Comments
Joined 2 years ago
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Cake day: July 16th, 2023

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  • Hmm, while the topic is important, the petition may not be so much. OP certainly left some questionable comments as shown through their moderation history and they seem to easily overreact which got them banned for spamming this petition on the fediverse. Dessalines and Nutomic, the creators of Lemmy, are known to have some problematic political stances and it is nice to see that this is not forgotten. Hopefully we’ll see some more discourse about this in the next few days on the fediverse but I don’t see a point in signing this for now :P









  • I hope you’re alright after that physical attack! Hope someone educated the kid on their autism and their actions too. I think I slightly understand the train of thought with the “it’s not an animal” argument though. I’m guessing the kid assumed that the word gold was reserved for actual gold unless talking about animals like the golden hamster or goldfish where it just meant gold colored :P

    Edit: also sorry for sending this comment thrice, no idea how that happened



  • Maybe, I really couldn’t tell that. To me this was a story about someone’s autistic brother who had multiple mental breakdowns with rampaging construction sites and injuring other classmates. ¯\_(ツ)_/¯

    I wouldn’t expect many people to know about concretes dangerous environmental impact through released CO2 during production and it is not mentioned in the post either.






  • Indeed, usually you would want to avoid a notation of sqrt(-1) or (-1)^(1/2). You would use e^(1/2 log(-1)) instead because mathematicians have already decided on a “natural” way to define the logarithm of complex numbers. The problem here lies with choosing a branch of the logarithm as e^z = x has infinitely many complex solutions z. Mathematicians have already decided on a default branch of the logarithm you would usually use. This matters because depending on the branch you choose sqrt(-1) either gives i or -i. A square-root is usually defined to only give the positive solution (if it had multiple values it wouldn’t fit the definition of a function anymore) but on the complex plane there isn’t really a “positive” direction. You would have to choose that first to make sure sqrt is defined as a function and you do that via the logarithm branch.
    So, just writing sqrt(-1) leaves ambiguity as you could either define it to give i or -i but writing e^(1/2 log(-1)) then everyone would just assume you use the default logarithm branch and the solution is i.