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Cake day: July 1st, 2024

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  • Honestly the idea that parasites all share a single, simple method of reproduction is the silliest thing in this comic. There’s a cordyceps fungus that not only has a stage in an ant, it then swells and reddens the abdomen of the ant, takes over the behavior of the ant and forces it to climb to the top of a stalk of grass, and has it wave in the air until a bird mistakes it for a berry and swoops down and eats it. At this point it has a whole other phase of its life cycle inside the bird until it finally releases its spores in the bird’s droppings.

    (I probably have a few of the details here not quite right, as it’s not my field of expertise, but it’s along these lines, including the behavior modification and the two separate host species.)

    There are so many kinds of parasites, and they do so many crazy things.













  • Yeah, that’s basically how I remember it, though it’s not always stats–the terms are used in other fields of math as well. A first calculus class typically includes a proof that the limit of the sum of an infinite geometric series (a + ar + ar^2 + ar^3 + …) tends towards a/(1-r) where a is the first term and r is the ratio of successive terms, provided that -1 < r < 1. (Otherwise the series diverges and the limit isn’t defined.)





  • monotremata@lemmy.catoScience Memes@mander.xyznooo my genderinos
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    2 months ago

    Also the mathematicians wouldn’t decline to give an answer.

    Are you sure? I only minored in math, but even I would struggle to provide an answer to this. It would have to be something incredibly vague, like “a number is a mathematical object that has certain consistent properties relevant to the field of study.” Because otherwise you get situations like “is infinity a number?” and you can’t answer categorically, because usually it’s not, but then you look at the transfinite numbers where you can indeed have omega-plus-one as a number. And someone asks if you can have an infinite number of digits to the left of the decimal place, and you say “well, not in the reals, but there are the P-adic numbers…” and folks ask if you can have an infinitely small number and you say “well, in the reals you can only have an arbitrarily small number, but in game theory there are the surreal numbers, where…”

    So yeah, I’m not sure “what is a number” is even a math question. It’s more a philosophy question, or sometimes a cognitive science question (like Lakoff and Nuñez’s “Where Mathematics Comes From”).


  • I sincerely think that China’s massive government investment in solar panel production is the biggest thing our species has done about climate change. It’s the reason it’s now cheaper to build a new solar plant than to continue to operate an existing coal-powered plant. (Though we’re not doing that in the US, because we’ve bottlenecked grid connection requests, which is holding up a ton of new solar buildouts.)

    I mean it’s not enough yet, but it’s made a huge dent in the problem. Economics actually favor shifting to renewables at this point. It’s just the entrenched interests working against it we have to overcome now.