>>6851693 >Wow, whoever made this is a pleb or a troll.
I would put myself just above the "Serious Math" gap but there are plenty of things below it that I not only understand but use easily, e.g. Real Analysis, Complex Analysis, non-Euclidean Geometry, Boolean Algebra, Control Theory and, while they aren't on that list, the famous Triple Integrals.
>>6852355 >Triple integrals are a way's above the Serious Math threshold.
Do these words mean something different than I expect? English is not my first language, but we ARE just referring to solving field equations in 3D, right?
>>6852317 >that's not mathematics, that's literaly witchcraft.
Depends on how they're generated. They DID break some one-time pads during WWII due to the secretaries not liking X and Z and so having a non-zero chance of throwing those balls back, breaking the perfect randomness.
>Do these words mean something different than I expect? English is not my first language, but we ARE just referring to solving field equations in 3D, right? Yeah, I don't know why it's all the way up there either. Even le reddit agrees.
>>6851402 No matter how complex and advanced a subject xyz, with time approaching infinity the probability of encountering some stuck-up asshole trying to belittle it as "babby's first xyz" approaches 1.
>>6852390 >you can't go FTL What if two objects are exactly on a collision course, one with velocity 0.9999...c and the other -0.9999...c? Subtracting the velocities you get 1.9999...c.
>escape a black hole A human would die even before crossing the event horizon, let alone before approaching the singularity at the center. Beyond the event horizon any motion (no matter whether matter or energy) can only be towards the singularity, and even when approaching the event horizon from the outside anything to move more or less away from the center of the black hole would reach relativistic velocities. That clearly means that living organisms (and also machinery or circuitry) would certainly not be able to function in a certain vicinity of the black hole.
>>6852390 >can't go FTL or escape a black hole The very existence of a black hole's event horizon implies that speeds > c exist at least thoretically (specifically, the singularity's escape velocity becomes > c inside the event horizon.
Also, the existence of horizon which limits our observable universe implies that the relative speed between us and certain very far galaxies has exceeded c at some point, as a result of which they are now outside our observability horizon.
>>6852771 Did you even read the post you're replying to? How would you survive if anything within your body and around you can only move towards the point at the center? No organism, machine, or circuitry can possibly function under such condition, because nothing can possibly interoperate in any way.
>>6852646 Then how do you explain the fact that the visible universe is only a fraction of the whole? The galaxies which are beyond our observation horizon must clearly be moving away from us at a relative speed greater than c.
Also, If two objects are on a collision course with a speed of, say, 0.9c, then how can their relative speed be less than c?
>What if two objects are exactly on a collision course, one with velocity 0.9999...c and the other -0.9999...c? Subtracting the velocities you get 1.9999...c.
it's trollphysics meme-tier. It sounds reasonable only if you haven't been to school since the XIX century. In case you are not trolling: when you reach relativistic speeds you cannot use simple addition, you need Lorentz transformation.
Both of your intuitions in this post are wrong, but it's too annoying to explain why on mobile. Research "metric expansion of space" and "special relativity" for your first and second questions, respectively. Nothing moves > c relative to anything else. It seems paradoxical but it isn't.
>>6852827 >The problem here is that "used correctly" implies "having a truly random generator".
well, that is the definition of a one-time pad. If it's not truly random because of some practical/engineering reasons then the problem is no longer mathematical, therefore it doesn't belong in this picture.
>>6852839 Some parts of the universe *must* have moved away from us at a relative speed greater than c, otherwise there's no possiblity the visible universe could actually be smaller than the whole universe.
Besides, Lawrence Krauss says that this is possible and permitted by general relativity (skip to 51 min 07 sec):
>>6852867 So Laurence Krauss is full of shit when he literally says that general relativity permits galaxies to be moving away from each other at speeds greater than light?
Why does every "nothing can exceed c in any way, hurr" smartpants evade to give a clear-cut answer to the simple question asking how it is possible that the visible universe is smaller than the whole of it?
>>6852881 Special relativity is a local simplification. You can have recession velocities greater than the speed of light, these are regularly observed, however this is not he relative velocity you see in SR.
>>6852850 The problem is, if you accept to ground your algorithms on premises that can't be realized practically, you've solved a lot of problems, except that you haven't really solved anything.
For instance it makes sense to say that we know how to tell when a number is prime or not (Wilson's theorem allows it, for instance). But the algorithm generated by Wilson is too bad, complexity-wise, to be of any reasonable use. So it makes more sense yet to say that we have an idea of how to find when a number is prime or not, but the problem is still wide open.
It's a bad idea to sidestep problems on the grounds that they are the concern of an engineer or a computer scientist rather than that of a mathematician. If a problem can be adressed mathematics-wise (for instance here, if we can find an encryption algorithm that's good but doesn't rely on randomization, or works well even with imperfect randomization), it should be.
Having a uncrackable encryption method that can never be implemented is fun, but ultimately it's not getting to the core of the problem.
I can't watch videos now, but I wouldn't expect him to be "full of shit" so much as oversimplifying a difficult idea for a broad audience to the point where it's misleading. I'm certainly not claiming I know more than him, so calm your appeals to authority.
As for how, why do you think it's impossible? If you think it's because stuff has to travel "outwards" from " the location of the big bang," you can stop right there, since there is no such thing. The big bang happened everywhere at once.
Finally, please look up metric expansion. Don't think of receding galaxies as moving away, because they're not. Rather, more space is being added between us.
>>6852881 Other anon is absolutely right, the other galaxies are not "moving" away from us at the speed of light, rather the actual spacetime around them is expanding the distance between us, which can and does happen at a "speed" faster than the speed of light. I hesitate to call it a "speed" because a speed is measured with a constant length metric, obviously if you change the length metric constantly, you have something different.
Junior physics major here, just what I understand about GR>
>>6852885 >from a mathematical point of view, it's trivial. it's just that in practice, it's not feasible...
I challenge you to show a trivial algorithm for decrypting an arbitrary message encrypted by one-time pad. You're allowed to be as computationally complex as you want since you've admitted to the infeasibility.
dont know about physic one but someone made a music related one
Things about this list 1-This list is about 2deepness4u and not about quality 2-Being level 6 doenst mean the thing is 3 times more deeper4u than a level 2 stuff. It just means its more deeper4u than tier 5 and less deeper4u than tier 7.
>Level 1 Post-grunge Pop-punk Eurodance Disco Italo-disco Eurobeat Freestyle Country music House (excluding house sub-genres I say on other levels) Synthpop R&B Hip-Hop Casiocore Electro house "Euro trance" (excluding dutch trance) Contemporary folk (problably would split into different levels if I knew what are the genres that contemporary folk have)
>Level 2 Nu-metal Hard Rock Dutch Trance Filter House Hard House Tech House Acid House Happy Hardcore Neue Deutsche Härte Vocal Jazz Punk Rock (excluding pop-punk, grindcore, noise rock, powerviolence, hardcore)
>Level 4 Power metal Heavy Metal Dungeon Synth Winter Synth Progressive Metal Math Rock Hardcore (Punk Rock one) Metalcore Ambient breaks Worldbeat Post-rock Stoner Doom Metal Industrial Metal Trip Hop Ambient House Smooth Jazz
>>6854352 >level 5 Acid jazz Hardstyle Jumpstyle Martial Industrial Classical Music New Age Thrash metal Folk Metal Minimalism Classic Industrial Traditional Folk IDM Techno Powerviolence Digital Hardcore Softer Hardcore (electronic music one) subgenres (excluding happy hardcore) Traditional Doom metal
>Level 6 Sludge Doom Metal Death/doom Metal Noise Rock Grindcore Death Metal Black metal Avant-garde Jazz Terrorcore Ambient Techno Ambient Psy Ambient Trance Ethereal Dakwave
>Level 7 Funeral Doom Metal Ambient Glitch Speedcore Power noise
>Level 8 Free Jazz Breakcore Musique Concrete Drone Doom Metal
>Level 9 Dark Ambient Field Recordings
>Level 10 Power Electronics Onkyo
>Level infinite Lowercase Harsh Noise
PS: if you really want to know your tier, make a list with the genres you like alot of songs,, the one with lowest tier is your tier, so someone that like post-grunge and harsh noise will have a tier of infinite
>>6851402 The last section of this pic is obviously a joke, since they are either vacuous or humorously impossible. The middle two sections aren't ordered properly, cohomology is hardly "genius" level mathematics, and the poincare conjecture is a millenium prize problem.
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