Cirrus Light
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@Nittany Discord  
I’m working on my BS (heheh). Only now touching on the mathematics of GR with that one professor, which I believe is the basis for string theory’s geometry/spacetime? Now I’m curious.
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@emittghiliwtyxes  
I have a bachelors in physics, but never studied string theory. I can only draw my own conclusions based on what I know.
emittghiliwtyxes

@Cirrus Light  
Of course its a groundless assumption! Its a quick drawing of a pony in paint.net. This wasn’t meant to take this seriously, lol.
emittghiliwtyxes

Wow I didn’t expect my silly drawing to turn into a full physics/mathematics debate! I never claimed to know much about dimension 4 and 5 when drawing this (Other than what I’ve read); I just wanted to make an oc that thinks about crazy shit. My degree is in geology anyway! How can someone who studies rocks know anything about theortical physics or string theory?
 
This debate is quite entertaining and I’m learning a bit, so keep it up guys!
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@Cirrus Light  
I have a bachelors in physics, so I know more about physics that most people, but I won’t even profess that I know much about string theory. I was just going on what read over various years of Youtube videos and magazines.
 
Of course that material is going to make the concept very simplistic because the theory itself is beyond most people’s understanding. They don’t know anything about linear algebra, vector spaces, gamma functions, thinking of dimensions as mathematical objects, and so on. They’re just happy getting told what strings are in their world.
 
I don’t reject string theory, but I was just leaving the possibility open that it could be wrong given that I only know the tip of the iceburg on the theory. If the underlying math says it’s solid, then it’s probably a solid theory. It’s just insanely hard to verify from my understanding of string theory.
 
I am getting frustrated that people somehow pulled a conclusion about probability spaces from “Is she trying to understand string theory?”
 
I mean, Vree, I look this shit up when I’m curious on Wikipedia and try to get a deeper understanding of what I’m talking about. I guess I feel like I’m being accused of severe ignorance when I’m actually very curious about these concepts and want to understand them more.
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@emittghiliwtyxes  
But it’s a completely groundless assumption that isn’t based on very successful models we have - mathematical tools to understand geometry.
 
 
@Vree  
@Nittany Discord  
Okay, and that’s where I come in. See, most people only know about it from reading a magazine. I’ve actually studied it for years and continue to do so, read multiple books and textbooks on the subject from experts in the field and meet weekly with a Ph.D in it (at least when anxiety and physical health don’t keep me…). I may not be an “expert” per sae, but unlike the layperson, I’ve spent years studying it.
 
And I can tell you with a pretty high degree of certainty that calling a higher dimension “possible outcomes” and stuff like that just doesn’t make any sense.
 
Dimensions are just directions. This is very well physically and mathematically understood. Higher dimensions are just directions that are not any combination of the well-understood up/down, left/right, forward/back. Nothing mystical or pseudosciency “probability” direction about them.
 
Now, you can model probability spaces and such - but thinking that’s an actual physical direction is just a misunderstanding of technical terms and what a “space” is. A vector space is just a mathematical concept with certain criteria and definitions. You can no more walk through, or build a portal through a probability space than you can draw a graph on a chalkboard of “number of hugs Pinkie Pie gives” vs. “episode number” and “season number” and find patterns in that “space” and travel through it.
 
The 5th dimension is just another direction, nothing else to it. That’s all. Attributing anything else to it is just silly and makes no physical sense. Might as well call it the hug dimension or the sandpaper dimension or something.
 
 
And special relativity, too, not just GR uses time for the 4th dimension.
 
 
As for string theory, it’s a popular theory for good reason. It actually has a fair bit to say about making predictions about things like black holes and singularities - the Ph.D I meet with actually mentioned this when I met him last Tuesday. String theory even makes some testable predictions about gravity and how it behaves at smaller lengths.
 
The problem is you can’t falsify it. Basically, with higher-dimensional spaces, gravity should “leak” into the smaller dimensions, and thus its “strength” won’t fall off by the inverse-square as Newton says, but will fall of by an inverse~~(higher power) function (ie, in Newton’s excellent approximation to gravity, a = GM/r2, but for higher dimensional space this generalizes to a = GM/r(n ~~ 1), where n is the number of dimensions). So you can confirm (find evidence for) string theory, but you can’t “disprove” it in this way since the dimensions gravity leaks into may just be smaller than your instrument can detect.
 
That’s just one example, but it kind of illustrates how something can be confirmable, but not deniable. Most experiments our species can carry out are like that. If we could build arbitrarily powerful particle accelerators, we could prove it, maybe even disprove it (limits of my knowledge, here), but we can only do so much without building, say, a Dyson sphere to power a particle accelerator as large as the solar system :p
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@Vree  
I always consider the 4th dimension time, but like I said, I don’t know much about string theory, but I know it uses one time dimension.
 
Also, yeah, it is the most popular theory of everything as they call it, but I don’t think it’s the only one. The huge drawback of string theory is that it’s currently unverifiable experimentally.
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You should be able to tell from the pic that he’s thinking about dimensions even if you’ve never heard of a tesseract.
 
@Nittany Discord  
String theory is just a hyped-up eample of one of many relativity/quantum mechanics unification models.
 
@Cirrus Light  
@Nittany Discord
The fourth dimension is time
 
in general relativity. Where unifying time and space has a specific purpose, and time dimensions still have fundamental differences from spatial ones.
 
I think it’s generally no good to try to discuss higher physics unless you’re an actual expert. A lot of people feel like they know something about them after reading a magazine on them, but they really don’t. The stuff that magaiznes write on them is usually very silly.
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@Cirrus Light  
String theory rests in a 11-dimensional framework, at least if you go by M-theory.
 
@emittghiliwtyxes  
Gotta look those up.
emittghiliwtyxes

@Nittany Discord  
Maybe. She has dimensions 6-11 left out figure out before understanding Calabi - Yau manifolds…
emittghiliwtyxes

@Cirrus Light  
It depends. Its still unknown whether time is different than spatial dimensions or just appears to be due to lack of understanding. Also if there is a dimension that lies at right angles to the first 4 including time, it would be a way to travel between different outcomes or future timelines. I couldn’t think of better name than probability. I think its fitting.
Cirrus Light
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Higher dimensions. And it’s in the description.
 
Dimensions are just directions, though. The fourth dimension is time (which has some odd, different properties than spatial dimensions), but spatial dimensions beyond 3 aren’t probability and such. The fourth spatial direction is a direction that is not any combination of forward/back, left/right, or up/down. It’s almost impossible to visualize, but that’s what it is, in the same way that the third dimension is a whole new direction that’s not any combination of length and width.
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Is she trying to understand string theory?