Reality
Introduction
Slide Presentation
Introduction
to
Reality Roots
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Simplified
Discussion
Pages
Reality Simplified
Essence
Matter
Celestial Bodies
Life
Detailed
Discussion
Pages
Reality Detailed
Reality Revealed
Religion
Early History
Hinduism
Buddhism
Zoroastrianism
Judaism
Christianity
Islam History
Spread of Islam
Philosophy
Ancient Greeks
Things
Principles
Roots
Emergence
Substance
Entity
Causality
Perfection
Science
Big Bang Universe
Universe Dynamic
TimeSpace
SpaceTime
Relativity
Energy
Symmetry
Particles 1
Particles 2
Particles 3
Waves
Atoms
Molecules
Complexity
Link Five
Reference
Glossary

Structures
(Page under development)
Reality
Groups of
Things (objects)
Sets
Pairs in Unity
Pairs may be understood "One" yet relate in Two (2) ways.
Difference
(State of Existence)
Inseparable
Conjugate Pair as "One"
understood to have Unity
(pair that cannot be separated)
a pair by its limits
(Analogy: A line that is One length,
but a pair
by the Two ends of line  Diameter of a Circle)

Unseparable
Conjugate Pair as "One"
understood to have Unity
(pair that cannot be separate)
a pair by limits of opposits
(Analogy: A line that is One length, but a pair
by
Two the opposites of its ends  Radii of a Circle) 
Set theory is the branch of mathematical logic that studies Sets.
Sets are collections of objects.
Set Theory is applied most often to objects of mathematics.
However,
Set Theory can be used to analysis any group of objects.
Any type of object can be collected into a set.
Just as arithmetic features binary (pair) operations on numbers,
Set Theory features binary operations on sets within Reality.
"ONE SET"
Pairs of Identities, Three (3), relating inseparably.
"Conjugate Pairs"
Thing
as
Set
defined by
Limits of Three (3) pairs
Each pair as an Identity
One Thing, in its self,
defined by its limits
Thing
Set of Three (3)
as
conjugate pair

Identity
"Oneness"
_________________
Identity
Existence
"Process"
_________
identity
Form
"Structure" 
Thing

Universe
Space
Structural
Place
(Derivative of Space)
defined by
Limits of Three (3) pairs
Univers is
Material
Space
HeightDepthWidth

Universe
Structure of Unity  Process of Bioty
Unity is Oneness  Pair is Difference  Bioty is Two (2) Pair Difference
Matter
(Potential Energy)
Charge

Particle
Anitparticle 
Matter
Ordinary
One time Increment 
Energy
Ordinary
Two (2) Time
Increments

Human understanding of Reality, by no small measure,
is a significant challenge of speculative Knowledge.
Human perception of change gives a clue that Reality must,
in some part, be a process. Further, perception tells us that
Structure is another part of Reality. However, there are different
kinds of structures, those that just stand (buildings) and those
that move  stars, planets, vehicles, animals and humans, etc.
Why 8 electrons form a stable shell Structure of an Atom
The presence of 8 slots in the shell of Atoms has been taught historicallyfor a long time as if it were a purely empirical observation. However, it can actually be derived from the axioms of quantum mechanics and the geometry of 3dimensional space. Below is an overview of some of the relevant features of the derivation.
If you solve Schrödinger’s equation for an electron in the potential well of a nucleus, you can find every possible bound state that the electron could possibly have. Finding the solution involves making sure that the electron's wave function repeats itself at intervals that allow it to "fit" around the nucleus.
By analogy, consider a wave on a length of string. It has peaks and troughs at a certain period. The goal is to find which periods (wavelengths) will "fit" on the string, such that if you bring the two ends of the string together to form a loop around the nucleus, there will be no discontinuities in the wave. The resulting waves are called harmonics:
A harmonic of a wave is a component frequency of the signal that is an integer multiple of the fundamental frequency, i.e. if the fundamental frequency is f, the harmonics have frequencies 2f, 3f, 4f, . . . etc. The harmonics have the property that they are all periodic at the fundamental frequency; therefore the sum of harmonics is also periodic at that frequency. Harmonic frequencies are equally spaced by the width of the fundamental frequency and can be found by repeatedly adding that frequency. For example, if the fundamental frequency (first harmonic) is 25 Hz, the frequencies of the next harmonics are: 50 Hz (2nd harmonic), 75 Hz (3rd harmonic), 100 Hz (4th harmonic) etc.
A loop is sufficient to wrap around a point in a 2 dimensional plane, but electrons and atoms exist in 3 dimensions. Hence, we have to make sure the electron's wave function "fits" in both of the two angular degrees of freedom around a point in 3 dimensions. The waves that "fit" around a central point in 3 dimensions are called spherical harmonics:
In mathematics, spherical harmonics are the angular portion of a set of solutions to Laplace’s equation. Represented in a system of spherical coordinates, Laplace's spherical harmonics are a specific set of spherical harmonics that forms an orthogonal system, first introduced by Pierre Simon de Laplace in 1782. Spherical harmonics are important in many theoretical and practical applications, particularly in the computation of atomic orbital electro configurations, representation of gravitational fields, geoids, and the magnetic fields of planetary bodies and stars, and characterization of the cosmic microwave background radiation. In 3D computer graphics, spherical harmonics play a special role in a wide variety of topics including indirect lighting ( ambient occlusion, global illumination, precomputed radiance transfer, etc.) and modeling of 3D shapes.
Since there are two angular degrees of freedom around a point in 3 dimensions, it takes two numbers to identify a given solution that fits. As a result, there are a total of three numbers needed to fully identify a wave function solution:
n: quantization in energy
l (lowercase L): quantization in first angular degree of freedom
m: quantization in second angular degree of freedom
Purely from the math of the solution and the rules of geometry, one finds that the following rules must be satisfied in order for the solution to fit:
n must be a positive integer (1, 2, 3, ...)
for a given n, l can be any integer from 0 to n1 inclusive
for a given l, m can be any integer from l to l inclusive
In addition, the properties of the electron dictate that:
for a given n, l, and m, there are two possible electron states: one for spin up and one for spin down
Putting all these rules together, we can count the number of "slots" available for electrons to fill up a given shell.
For the lowest energy shell (n=1), l can be any integer from 0 to 0. That is, it can only be 0. In turn, for l=0, m can be only 0 to 0, meaning it can also only be 0. This means there is only one allowed combination with n=1, namely the one where n=1, l=0, and m=0. Since electrons can be spin up or spin down, this means there are 2 total slots available. This is why hydrogen and helium are stable with 2 electrons  because those 2 electrons fill the n=1 shell.
For the next energy shell (n=2), l can be 0 to 1. For l=0, m can be only 0. For l=1, m can be 1, 0, or 1.
This forms the following set of allowed values:
n=2, l=0, m=0
n=2, l=1, m=1
n=2, l=1, m=0
n=2, l=1, m=1
Since there are 4 allowed values, the shell has 8 slots for electrons (accounting for spin).

Difference Theory
Pairs
Deterministic  Pervasive  Ubiquitous
Difference in States
(Mode of Being)
Philosophical Theory of Reality that may be understood as:
State in Potency Structure of Opposites
State in Process of Limits
Two (2) closed pairs, conjugate (unseparable) as Pairs,
understood as "one", Identity, convergence internally
and functioning externally in divergence. 