### Foreword

**first, second, and third dimensions**, and why

**fractals**don’t belong to any of them, as well as what happens when you get into

**higher dimensions**. But before getting into the nitty-gritty of the subject, I think it’s worth prefacing this post with a short note on the nature of mathematics itself:

**rigorous aesthetic**; it tells us nothing of real being, but forges a

**fiction of intelligible consistency**. That being said, I think it’s interesting to think about whether or not mathematics were invented or discovered – whether or not numbers exist outside of the human mind.

**a tool**to measure and represent ‘real world’ things. In other words, our knowledge of

**mathematics has its limitations**as far as understanding the space-time continuum goes.

# 1 Traditional Dimensions

In physics and mathematics, dimensions are used to define the Cartesian plains. The measure of a mathematical space is based on the **number of variables require** to define it. The dimension of an object is defined by **how many coordinates are required** to specify a point on it.

### 1.1 – Zero Dimensions

Something of zero dimensions give us **a point**. While a point can inhabit (and be defined in) higher dimensions, the point itself has a dimension of zero; you cannot move anywhere on a point.

### 1.2 – One Dimension

**typically bound by two zero-dimensional things**.

**one coordinate**is required to define a point on the curve.

**you’d only have access to one dimension**, even though you’d be technically moving through three dimensions.

### 1.3 – Two Dimensions

Surfaces or plains gives us two-dimensional shapes, and are** typically bound by one-dimensional shapes **(lines/curves).

A plain can be defined by ** x**&

*y*,

**&**

*y***or**

*z***&**

*x***; more complex surfaces are commonly defined by**

*z**&*

**u***values. These variable are arbitrary, what is important is that there are two of them.*

**v****Two coordinate**are required to define a point on a surface. For example a sphere is a three-dimensional object, but the surface of a sphere is two-dimensional – a point can be define on the surface of a sphere with latitude and longitude.

### 1.4 – Three Dimensions

A volume gives us a three-dimensional shape, and **can be bound by two-dimensional shapes **(surfaces).

*,*

**x***and*

**y***axis. If a person were to swim in a body of water, their position could be defined by no less than*

**z****three coordinates**– their latitude, longitude and depth. Traveling through this body of water grants access to three dimensions.

# 2 Fractal Dimensions

Fractals can be generally classified as **shapes with a non-integer dimension **(a dimension** **that is not a whole number). They may or may not be self-similar, but are typically measured by their properties at different scales.

Felix Hausdorff and Abram Besicovitch demonstrated that, though a line has a dimension of one and a square a dimension of two, **many curves fit in-between dimensions** due to the varying amounts of information they contain. These **dimensions between whole numbers **are known as Hausdorff-Besicovitch dimensions.

### 2.1 – Between the First & Second Dimensions

**one coordinate**is required to define a point on them.

Surfaces give us two-dimensional shapes, where **two coordinate** are required to define a point on them.

**does not have access the two whole dimensions**.

If you were to walk along the shape starting from the base, you could go forwards and backwards, but suddenly you have an option that’s more than forwards and backwards, but less than left and right.

You cannot define a point on this shape with a single coordinate, and a two coordinate system would define a point off of the shape more often than not.

### 2.2 – Between the Second & Third Dimensions

Surfaces give us two-dimensional shapes, where **two coordinate** are required to define a point on them.

A volume gives us a three-dimensional shape where a point could be defined by no less than **three coordinates**.

While these models live in three dimensions, they do not quite have access to all of them. You cannot define a point on them with two coordinates: they are **more than a surface and less than a volume**.

### 2.3 – Calculating Fractal Dimensions

#### On another note:

# 3 Higher Dimensions

**nearly impossible to visualise, higher dimensions**. This is in the same way that a two-dimensional being would find it impossibly hard to think about our three-dimensional world, a subject explored in the novel ‘

*Flatland’*by Edwin A. Abbott.

That being said, it’s plausible that we experience much higher dimensions that are just **too hard to perceive**. For example, an ant walking along the surface of a sphere will only ever perceive two dimensions, but is moving through three dimensions, and is subject to the fourth (temporal) dimension.

### 3.1 – The Fourth Dimension (Temporal)

**you have never met someone at a place, unless it was at a time; you have never met someone at a time, unless it was at a place**[…]”

**,**

*x***&**

*y**and our fourth*

**z**,*:*

**t***latitude, longitude, altitude and time, respectively. In this instance,*

**time is linear**, and time & space are one. As if the universe is a kind of film, where going forwards and backwards in time will always yield the exact same outcome; no matter how many times you return to a point in point time, you will always find yourself (and everything else) in the exact same place.

**time is something that can be moved through as freely**as swimming or walking.

### 3.2 – The Fourth Dimension (Spacial)

If we explore **spacial dimensions**, a four-dimensional object may be achieved by ‘folding’ three-dimensional objects together. They cannot exist in our three-dimensional world, but there are tricks to visualise them.

We know that we can construct a cube by folding a series of two-dimensional surfaces together, but this is only possible with the third dimension, which we have access to.

If we visualise, in two dimensions, a cube rotating (as seen above), it looks like each surface is distorting, growing and shrinking, and is passing through the other. However we are familiar enough with the cube as a shape to know that this is simply **a trick of perspective** – that objects only* look* smaller when they are farther away.

In the same way that a cube is made of six squares, a four-dimensional cube (hypercube or tesseract), is made of eight cubes.

- A line is bound by two zero-dimensional things
- A square is bound by four one-dimensional shapes
- A cube is bound by six two-dimensional surfaces
- A hypercube, bound by eight three-dimensional volumes

It looks like each cube is distorting, growing and shrinking, and passing through the other. This is because **we can only represent eight cubes folding together** in the fourth dimension with three-dimensional perspective animation.

Perspective makes it *look* like the cubes are growing and shrinking, when** they are simply getting closer and further in four-dimensional space**. If somehow we could access this higher dimension, we would see these cubes fold together unharmed the same way forming a cube leaves each square unharmed.

Below is a three-dimensional perspective view of hypercube rotating in four dimensions, where (in four-dimensional space) all eight cubes are always the same, but are being subjected to perspective.

### 3.3 – The Fifth and Sixth Dimensions

(For example: ** x, y, z, t_{1}, t_{2}, t_{3}**)

This is a space where one can move through time based on probability and permutations of what could have been, is, was, or will be on **alternate timelines**. For any one point in this space, there are **six coordinates** that describe its position.

**it becomes increasingly difficult for us to visualise**what is happening to the shapes that we’re folding.

*R*)

_{1}, R_{2}, R_{3},R_{4},R_{5}, R_{6}, R_{7 }etc.There’s a terrific explanation of what happens to platonic solids and regular polytopes in higher dimensions on Numberphile: https://youtu.be/2s4TqVAbfz4

### 3.4 – Even Higher Dimensions

**the laws of gravity are different, the speed of light has changed**.

Dimensions seven though ten are **different universes** with different possibilities, and impossibilities, and even different laws of physics. These grasp all the possibilities and permutations of how each universe operates, and the whole of reality with all the permutations they’re in, throughout all of time and space. The highest dimension is the encompassment of all of those universes, possibilities, choices, times, places all into a single ‘thing.’

These ten time-space dimensions belong to something called **Super-string Theory**, which is what physicist are using to help us understand the universe work.

While we don’t have experimental or observational evidence to confirm whether or not any of these additional dimensions really exist, theoretical physicists continue to use these studies to help us learn more about how the universe works. Like how gravity affects time, or the higher dimensions affect quantum theory.