Re: Understanding the quotient ring nomenclature



On Jun 20, 6:53 am, David Bernier
<david...@xxxxxxxxxxxx> wrote:
Tim BandTech.com wrote:
On Jun 15, 12:39 pm, Leland McInnes
<leland.mcin...@xxxxxxxxx> wrote:
On Jun 15, 9:37 am, "Tim BandTech.com"
<tttppp...@xxxxxxxxx> wrote:

On the one hand you've insisted that X will
never
be evaluated.
On the other hand you're going to wind up
evaluating X. For instance in the buildout of the
complex numbers from your infinite dimensional
X-form.

I'm pretty sure your problem
is that you don't understand it. I'm going to
have another go at explaining it in a different way
in another post, but please believe
me when I say that my understanding of it is
good, and I've tried in
vain to see how any of the complaints you
make
could apply to my
understanding (really, I have tried) and they
just don't. That means,
to me, that you don't understand it properly.

Entering the quotient ring stage with this
basis is
a fraudulent construction, especially if
claiming to have constructed
an instantiable basis such as the complex
numbers.
What, to you, makes something "instantiable"
exactly? What is more
instantiable about the symbol "i" than the
symbol "X"?

Nice question. I'm not so sure that there is
much
better about the
symbol i.
The math which I spoke of that replaces the X
format has no need of
the i format either.
The motivation of deriving i from a real basis
seems pretty far
fetched. From the perspective of ring
definition
the sum and product
operations are fundamental and their good
behavior is enough. We need
to address
X X = - 1 .
Here we see an assignment of a real value to
one
of these mysterious
domains of unassignables in X^n. This
statement
above I believe to be
invalid by your own usage of X. You've
insisted
that these X do not
perform this way. A real value is being
assigned
here to XX. You've
already insisted that this need never happen.
These X are somehow
sacred cows, or scare crows, all in a line
forming some fence that
need never be touched in a field of virtual
hay
which can somehow
still contain real values.

Complex analysis tags along with real analysis
fairly well. Also
complex math is involved in a fair amount of
physics and engineering
computation. I do accept the utility of this
rotational form. That
rotational form is also existent within the
real
value, though it's
apparency in the real form is diminished
beneath
what most will
perceive. I accept the junction of these two
maths; the real numbers
and the complex numbers. There need not be so
much magic in getting to
the next dimension as is going on in the ring
quotient. Rather, the
fundamental definitions of the real numbers (as
I
recall there are
already six or seven versions of them) can be
generalized.

It would be great to see your quotient ring go
to
work. I want to
understand how this happens. Just how you can
breach the hump of

[...]

Say we have the ring Z/(12Z), integers modulo
12.

Z/(12Z) has 12 elements:
[0], [1], [2], ... [11].

[0] = { ... -24, -12, 0, 12, 24, 36, ...} .

[0] is an _ideal_ of the ring Z.

[6] + [6] = [ 6+6] = [12 ] = [0] because
[0] = { ... -24, -12, 0, 12, 24, 36, ...}
and
[12] = { ... -24, -12, 0, 12, 24, 36, ...}.

[7]*[7] = [49] = [1] because 49-1 = 48 is a
multiple of 12.

----

If R denotes the ring of real numbers, and X^2 +1
a
polynomial
over R, we can add subtract and multiply
polynomials
modulo X^2 + 1. If f(X) and g(X) are polynomials
over the
reals, then f(X) is equivalent to g(X), modulo
X^2
+1, when
f(X) - g(X) is a multiple of X^2+1.

If f(X) is a polynomial over the reals, then we
could
denote the equivalence class of polynomials
equivalent
(or congruent) to f(X) modulo X^2 + 1 by:
[ f(X) ].

Then we can compute as below:

[X]^2 + 1 = [X] * [X] + 1 = [ X*X ] +1 =
= [X^2] + 1 = [ X^2 + 1 ].

[ X^2 + 1 ] = [ 0 ] , because
[ X^2 + 1 ] = { 0, X^2+1, -X^2 - 1, ... }.

So
[X]^2 + 1 = [X] * [X] + 1 = [ X*X ] +1 =
= [X^2] + 1 = [ X^2 + 1 ] = [0].

Result: [X]^2 + 1 = [0].

The square of [X] plus one is congruent to 0,
modulo X^2 + 1.

In the quotient ring R[X]/(X^2 + 1) ,
One of [X] or [-X] will play the role of
i=sqrt(-1)
in C.

David Bernier

Thanks David. I do see how the zero and the modulo
concept are tied to
one another here in your post and it is not so
apparent in the
introduction of the ideal so you have helped me
quite
a bit. I do not
claim to fully understand what you have written
yet.

As I see it the tie between standard modulo math
and
this X form is
abstract.
If we were to interperet modulo math as wrapping
the
space it works on
then we see two parallel interpretations of that
space: one as a
single tile and another as that tile layed out
repeatedly. Regardless
of which interpretation we adopt the two are
united.

Going off of this interpretation I would think
that
real numbers
modulo 2.1 for instance would be cleanly
represented
as a tile of line
segment of length 2.1 or alternatively copies of
this
segment layed
out bidirectionally from an origin. If we were to
chalk some marks on
the tile at say 1.0 and 2.0 we would see those
indentical marks in
repetition on the tiles as nauseum but on this
funny
interval of 2.1.
In higher dimension the tiles must pack but there
are
several ways of
doing that. Neatly there are no singularities on
this
mapping since
the lattice that has been set up is free to be
positioned relatively
without contaminating the locality. It's just an
echo
chamber (without
actual reflections) which would diffuse radiated
energy over time.

I disagree: these numbers do not respect the
prurient fussillitude of the colostomy bi-factor
in their rat-a-tat tiling of omerta. It is the
junctor in the operator of the variable X that
de-facilitates the ring expression.



This modulo concept remains within its
domain(set),
whereas your
interpretation puts the dimension of the
domain(set)
varying, I
believe. Otherwise there would be no claim of
getting
2 dimensional
numbers out, whether the source is either infinite
dimensional or one
dimensional. But this might help me to understand
how
the 2D
interpretation works:

The tartic schematic of the obstreporous
multidimensional product of rings offends
my sensibility.

Was f(x) one dimensional or infinite dimensional?
Alternatively you might criticize my context as
being
wrong. That
would leave me with the question of whether what
you
constructed is 2D
which I have somewhat presumed here.

Under the tiling arrangement if one were caught in
a
local position
the space would be regarded as flat and would be
indistinguishable
from its extended form, not unlike a Riemannian
space
but much
simpler. Still there would likely be cyclic
signals
passing but the

period of these might be so large as to be
indistinguishable for a
locally extended entity. I don't know what area of
mathematics
considers this but it is so simple that it ought
to
be in the genre
somewhere nearby to the modulo math which is
stressed
here.

The area is that of the vicissitude of
multidimensional
bi-factors (don't ask, don't tell!) within its own
realm of the ring R[X],delving in the utter
pomposity
of their respective fulcra. Yet the bombastic
pulsions
of 2-dimensional numbers revel in the tiling of the
plane.


Would
taking this branch place this math at odds with
abstract algebra and
its interpretation of X?

Penrose worked on tiling as I recall. Doesn't that
way bump into your
way here? Is there a resolution of this bifurcated
interpretation?

No. It is an injunction of an apathetic , lonely
masseur, scheming against the monstruosity of
the caret on a bivalvic disjunction.


- Tim

Have you considered writing a book on using
alchemy manuals and medieval lesbian poetry
to write mathematics?.

The most beautiful experience we can have is the mysterious. It is the fundamental emotion that stands at the cradle of true art and science. --Albert Einstein
.



Relevant Pages

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  • Re: Understanding the quotient ring nomenclature
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