A small tool to view real-world ActivityPub objects as JSON! Enter a URL
or username from Mastodon or a similar service below, and we'll send a
request with
the right
Accept
header
to the server to view the underlying object.
{
"@context": [
"https://www.w3.org/ns/activitystreams",
{
"ostatus": "http://ostatus.org#",
"atomUri": "ostatus:atomUri",
"inReplyToAtomUri": "ostatus:inReplyToAtomUri",
"conversation": "ostatus:conversation",
"sensitive": "as:sensitive",
"toot": "http://joinmastodon.org/ns#",
"votersCount": "toot:votersCount",
"litepub": "http://litepub.social/ns#",
"directMessage": "litepub:directMessage"
}
],
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"id": "https://infosec.exchange/users/sophieschmieg/statuses/113320236959907840",
"type": "Note",
"summary": "Physicists wielding ignorance as a super power",
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"published": "2024-10-17T01:46:32Z",
"url": "https://infosec.exchange/@sophieschmieg/113320236959907840",
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"content": "<p>But it doesn't end here, oh no. Physicists aquire the super power of mathematical ignorance early on in their career, at the start of their undergrad.<br />You might have asked why, when calculating differentials we write d/dx as the operator. And maybe even have noticed that when calculating integrals, dx again shows up in the symbol for the operator. You might even have asked a mathematician about that, and they probably told you that it is merely a coincidence, just a funny symbol, with no deeper meaning, and you really should not ask more questions about that. It was technically a lie, but it was a lie meant to protect you. There is a deeper meaning behind the dx, but the theory you need for that, the theory of differential forms, is some seriously advanced stuff, using exterior products, derivations, exact sequences of modules, and cohomology. It's something that is better left for a graduate program. <br />Of course physicists are not deterred by that. Worse still, when you tell them, after thorough warning, about cohomology and exact sequences and all that, they yell BORING and go ahead and tell their freshmen to just use differential forms. And not only that, they even tell them to divide two differential forms and pretend the result is well defined, "it's perfectly safe" they say. Of course, if a mathematician ever dared to divide differential forms, it would immediately blow up in their face and they would get seriously hurt. The mathematics is very clear on that. You can fill many many blackboards with counterexamples (wearing proper protective equipment, of course).<br />But when the freshmen physicists do it, they somehow are just fine. Don't get me wrong, it could definitely explode. It just doesn't. Because nature is trying to drive mathematicians insane.</p>",
"contentMap": {
"en": "<p>But it doesn't end here, oh no. Physicists aquire the super power of mathematical ignorance early on in their career, at the start of their undergrad.<br />You might have asked why, when calculating differentials we write d/dx as the operator. And maybe even have noticed that when calculating integrals, dx again shows up in the symbol for the operator. You might even have asked a mathematician about that, and they probably told you that it is merely a coincidence, just a funny symbol, with no deeper meaning, and you really should not ask more questions about that. It was technically a lie, but it was a lie meant to protect you. There is a deeper meaning behind the dx, but the theory you need for that, the theory of differential forms, is some seriously advanced stuff, using exterior products, derivations, exact sequences of modules, and cohomology. It's something that is better left for a graduate program. <br />Of course physicists are not deterred by that. Worse still, when you tell them, after thorough warning, about cohomology and exact sequences and all that, they yell BORING and go ahead and tell their freshmen to just use differential forms. And not only that, they even tell them to divide two differential forms and pretend the result is well defined, "it's perfectly safe" they say. Of course, if a mathematician ever dared to divide differential forms, it would immediately blow up in their face and they would get seriously hurt. The mathematics is very clear on that. You can fill many many blackboards with counterexamples (wearing proper protective equipment, of course).<br />But when the freshmen physicists do it, they somehow are just fine. Don't get me wrong, it could definitely explode. It just doesn't. Because nature is trying to drive mathematicians insane.</p>"
},
"updated": "2024-10-17T05:27:32Z",
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