String Theory and M Theory, Physics, Quantum Theory, and Learnable Science

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### **1. MIT OpenCourseWare – Linear Algebra**
- **Instructor:** Prof. Gilbert Strang (legend in the field)
- **Includes:** Full lecture videos, problem sets, exams
- **Why it’s great:** Deep, rigorous, and entirely self-paced
- [Explore the course](Linear Algebra | Mathematics | MIT OpenCourseWare)

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### **2. Khan Academy – Linear Algebra**
- **Format:** Short videos + interactive exercises
- **Why it’s great:** Gentle, visual, and beginner-friendly
- [Start learning here](Khan Academy)

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### **3. freeCodeCamp – 20-Hour YouTube Course**
- **Instructor:** Dr. Jim Hefferon (author of a free textbook)
- **Includes:** Full-length video lectures + downloadable textbook
- **Why it’s great:** Conceptual clarity with a relaxed pace
- [Watch the course](Learn Linear Algebra with This 20-Hour Course and Free Textbook)

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### **4. Coursera – Audit for Free**
- **Courses from:** Imperial College, University of London, and more
- **How:** Choose “Audit” during enrollment to skip payment
- **Why it’s great:** Structured university-level content
- [Browse Coursera’s free linear algebra courses](Free Linear Algebra Courses & Certificates [2025] | Coursera Learn Online)

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### **5. edX – Free Audit Option**
- **Courses from:** MIT, Georgia Tech, Harvard
- **How:** Select “Audit this course” at sign-up
- **Why it’s great:** Modular, high-quality academic content
- [Explore edX’s free linear algebra catalog](1400+ Linear Algebra Online Courses for 2025 | Explore Free Courses & Certifications | Class Central)

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Each of these lets you explore the math behind quantum mechanics and string theory without the gatekeeping. Want help picking one based on how abstract, visual, or hands-on you’d like it to be?

 

Human brain(hive mentality/planet) vs Humanity(personality/place you are born/culture/timeline/ect)

Does not compute...............we are borg?

Ps. i suck at math.

Mzzls

 

I realized I have the concept wrong. While I was reading about alternate universes, I realized that in physics, "dimensions" doesn't mean "alternate dimensions".

When we talk about other dimensions in physics, we are talking about measurement in other ways, and not what the article here says: other universes; (the other 'dimensions' are perhaps similar to the measurable first 4, spatial dimensions: length, height, and width, and the other measurable thing which is time, though it does not measure space.



AI:

In theoretical physics, especially in fields like string theory, we aren't saying that curled shapes or small sizes make things *exist* differently—rather, these are **mathematical frameworks** that alter how we describe and measure physical reality.

Here’s the nuance:
- A Calabi–Yau manifold or any “curled-up” geometry isn’t some alternate place—it’s a **geometric model** that reflects possible values or configurations of physical fields.
- What we perceive as particles or forces can emerge from the **mathematical structure** of these dimensions. For example, a string vibrating in a certain way due to the geometry could manifest as an electron.

So, what changes?
It’s not the existence of an object—but how we *measure* and *characterize* it:
The extra dimensions allow additional components in equations that shape the behavior of particles and interactions.
- These aren't visible in the everyday sense, but they **influence observable outcomes**, like mass, charge, and coupling constants.

 

String theory is named such because of a one dimension phenomena.

 

Since none of us (as far as I know) have personal experience outside 3 dimensions plus time. If we take away the metaphors, we are left with nothing.
Or looked at all this another way, are we the metaphors who could possibly understand the true meaning of infinity.

To travel through space for any distance, I see the only possibility as us having an existence as a hologram with only the mass of photons.
I developed these thoughts after discussions with commercial pilots about UFO's flying alongside. If these entities had mass, as they departed at what has often been described as the speed of light, the wake turbulence would cause the aircraft to drop out of the sky. Also, no sonic boom. ???

 

I think this is the most important part.

When we read a whole bunch of things in a row that are pretty obscure, it's kind of like a turn off, or some message in the background explaining, "by the way, you will only understand 10% of this."

Then you do the homework, and 10% more becomes 50% less opaque. :-\

Then you do your masters in particle physics. And one night you get pretty eccentric and head to ebay and buy ten of the largest dry erase boards available.

And then the weekend arrives and you hang them on every surface and spend $15 on red, blue, green, and black markers.

And the boards fill with math. And after a week, it's pretty incredible how much more of it is visible in the perceptual sense.

And particle theory, quantum theory, and string theory all begin to characterize thoughts.

And it begins to take shape; the physical world makes better sense because you decided to make sense of it.

 

It's funny since I was on about it, I realized by deduction:

The first three are spatial and the fourth is temporal (chronological), thus they are measurable then it dawned on me: the additional "dimensions" are not any different than the other four.

This is very generally simply how we measure the physical world! It's not 'interdimensional' as much as these are the 'dimensions' we use to describe things in terms that are inherent to physical science.

Spoiler: Physical Science

Physical science is a broad field that encompasses various disciplines studying non-living systems, including physics, chemistry, geology, and astronomy.

What I mean is I had been misunderstanding it! I had somehow interpreted this to be some kind of science fiction!

Physics examines the physical world, and in string theory we often mention a "smaller scale" as being responsible, or that "curled up" is a reason for something.

In fact, a Calabi-Yau Manifold IS curled up! It's just a complex geometric shape, but I'm not sure where science might encounter one, and now I'm imagining a close encounter with one on a microscopic scale and it's maybe something like finding a tardigrade in a biology lab.




Whatever might "create" or otherwise establish a Calabi-Yau Manifold in physical space and in the physical world is fascinating! The mathematical nature of measuring string theory's relationship to the physical world is such a small detail in the sum total, but it's a good place to point at our misunderstanding of science fiction's "dimensions", the twilight zone, and the dimensions inherent to physical space.

The misunderstanding is a little hilarious now, but it isn't one I would want to pass along.