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Michael,

"Using energy in an argument is implicitly the same as using time, and also has an implicit dependence upon space."

It would be the same as using energy implicitly implies volume and temperature as well, but we don't conflate these two as some sort of volumetemperature, even though ideal gas laws and conservation of energy means adjusting the volume of a quantity of energy has an inverse effect on its given temperature. One in which we could "model" as a multi-dimensional balloon, where squeezing the volume spikes the temperature.

In the current cosmological model, this relationship between volume and temperature of the background radiation is every bit as fundamental as the relationship of time and distance is to C.

The reason is that we understand temperature is a measure of energy and is not a foundational principle. Would you include temperature in this statement; "These are the foundational principles of science - metaphysics - and include issues of time, space, causation, mass etc. - you know, the usual suspects."

Hi Joy,

Yes, I looked at your time paper when you mentioned it before under Edwin's 30 Sept thread. I commented then that it was compatible with the existence of compactified dimensions of the Planck scale. I also suggested the idea of a closed SN surface sweeping through a Euclidean radial direction giving the appearance of time and the metric sign reversal seen in Minkowski spacetime. But as I mentioned in this thread, the idea doesn't quite work-out in a simple way.

On seeing different things in the same picture, I also see physical space as being S1, S3, S7 (i.e. 11D) and not the full 15D of S15 because of over-counting. If the sedenions were a normed division algebra, then I would agree with you on your hidden S4 being extra dimensions to give a 15D physical space, but the sedenions aren't a normed division algebra. As I described in my paper (plus book and essay) the S3 of isospin and S1 of hypercharge naturally unify in S4 - with a relativity of measurement issue giving the correct Weinberg angle. This S4 basespace of S7 is broken by the mapping to the spatial S3, leaving S3 fibre of S7 and S1 subspace of S4 basespace intact, i.e. S3*S1. This gives 4 dimensions associated with the map to space S3, and a different combination of 4 dimensions associated with the dimensions of intact particle symmetry, along with the 3 dimensions of space (and the rotation group). I think that these are the 4 dimensions of your S4 hidden domain, and they're not really extra dimensions.

In a sense, it looks as though the sedenions overdo the embedding of C, H, O, and this leaves extra freedom to choose how to describe the underlying physical dimensions - the 11D of the closed space in the 12D of R, C, H, O, less over-counting R by 3. This view would possibly suggest that your S7 condition wouldn't directly square with my physical spaces, because they are different options from S15.

The identification of the S1 with time naturally requires splitting it off first, as without a functional time dimension there would be no dynamics to talk about. I'm not sure what is kosher here either, as I haven't considered the sedenions precisely because they aren't a normed division algebra.

Best,

Michael

John,

Your volumetemperature argument depends on an implicit dependence between volume and temperature in their *definitions*, but there isn't any. I wouldn't include temperature as a foundational principle because it is defined by way of entropy change with energy. Entropy can be defined as configurational entropy, where the notion of a configuration changing depends upon the notion of causation - or the triple (causation, time, event). As the definition of energy in relativity has a dependence upon the same triple, temperature can be defined from this triple and so I wouldn't class it as a foundational principle. Note an implicit dependence on space has been slipped in under relativity - (causation, time, space, event).

Michael

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Michael,

Sorry but I cannot agree with your position (I am sure shared by others). You wrote down the standard way of thinking about the metric tensor when you formed the double contraction of the dx_i and the metric matrix as though all elements were scalars and the coefficients of dx_i are simply a scalar 1x8 matrix. This is where you went off the rails, for in O this is not the case. The differential form dx_i should be considered an O algebraic element, i.e. when using O algebra over the field of real numbers, real coefficients attached to, and inseparable from the O basis elements, not ignoring the basis elements as you appear to have done. Any multiplications are completely under the definition of the particular algebra in play. Thus generally speaking, the form of the desired scalar ds^2 is completely determined by the algebra and in fact whether or not it even admits a scalar product form.

The native O space is intrinsically (natively) rectilinear *because* the O basis elements are orthonormal, not due to any characteristic of the coordinates themselves. So there will always be a rectilinear representation of anything O. I derived the ensemble derivative from the position of a general curvilinear transformation off of the native rectilinear system and that is how it was introduced. I then presented the rectilinear ensemble form as the trivial transformation of the rectilinear to itself, a unity transformation. So I am unclear on your statement "... your derivative is written out in rectilinear co-ordinates".

This is not tensor calculus as you mention, for tensor calculus is all about matrix algebra, and O cannot be represented in a matrix form. Also, tensor calculus a priori assigns forms to be invariant, and then forces differentiation to work out by adding in the Christoffel stuff. My approach defined differentiation straight up as a diffeomorphism by determining what the curvilinear form for the limit of the O product of an O functional algebraic element with the O surface normal algebraic element divided by the enclosed volume as the volume approaches 0. This is a direct extension of the integral definition of 3D divergence, gradient and curl, after understanding the three different product types on the surface normal separately within them are all combined inside the more fundamental H (extendable to O) algebra.

There was no slight of hand, no changing of anything behind the scenes. I have not "derived the space-time split within (my) algebra". This split is the child of the less fundamental 4D space-time/tensor calculus approach and some choices within. It does not exist in O. It does not have to because O allows things to work out without it. This is purely the outcome of understanding the differential operator is an algebraic element, and its application is effectively a multiplication governed by the algebra. Take the time to go through it, you will find the results are as presented.

You stated "... but a space-time split as S1 is time and S10=S3*S7 is all the space." Are you requiring the split because of your belief this is how time and space *are* out of orthodoxy, or do you actually require it as an independent requirement of your specific work? This is unclear to me.

Rick

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Michael,

Wouldn't volume be implicit in an "entropy change with energy?"

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Hi Michael,

I think you are mistaken about the apparent over-counting of R in S15, both from the physical point of view and mathematical point of view.

You wrote: "If we look at all the normed division algebras, R, C, H, O the total dimension is 15, but R is occurring here 4 times: once on its own and once in each of C, H and O.

I am afraid this is a very strange way of looking at division algebras. There aren't any redundant occurrences of R in S15, because the algebras R, C, H, and O do not coincide on R. This is seen most clearly by noticing that S7, for example, is a non-trivial, non-product bundle of S3, and similarly S3 is a non-trivial, non-product bundle of S1. Identifying R's of O and H or those of H and C within such bundles is thus like identifying different animals because they appear to have the same number of heads. But the heads of R, C, H, and O aren't interchangeable like the heads of the mechanoid Kryten in Red Dwarf. So I think you are not only unjustifiably over-stretching the principle of "make no preference" in reducing the number of dimensions from 15 to 12, but also making a mathematical mistake in doing so.

But suppose we overlook this metaphysical and mathematical mistake and look at the issue purely physically. Well, then the evidence of quantum correlations suggests---and I have demonstrated this with a number of non-trivial examples of quantum states as well as a general theorem---that our physical space respects the symmetries of a parallelized 7-sphere in a manner different form that in particle physics. If we ignore this evidence and consider only S10 based theory, then the resulting Unified Physics would necessarily be Nonlocal (NonUP), because it would not be possible within it to reproduce, say, the GHZ-type four-particle correlation in terms of explicitly written down local functions. The only way to arrive at a manifestly Local Unified Physics (LocUP) is by recognizing the central role played by the manifold S15 in the edifice of division algebras.

Now Sedenions, as you point out, do not form a normed division algebra. But why should that stop us from considering them when they do in fact give us the normed division algebras at all physically relevant scales? Moreover, as a topological manifold S15 is no different from S10 or any other analytically manageable manifold. So there can be no mathematical reason for rejecting S15.

Finally, as you point out, there remains a question of time within an S15-based theory. But I think this problem is easily solvable in the manner I have suggested above. Therefore I remain optimistic about the S15 program.

Best,

Joy

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Michael,

" Note an implicit dependence on space has been slipped in under relativity - (causation, time, space, event)."

Isn't volume a measure of space?

The gold standard would be the idea the energy of the universe, from galaxies to background radiation, is being dispersed as the universe expands, ie. increases in volume.

As I recall, entropy is the amount of unusable energy in a system. It seems a useful idea for mechanical systems, but why is it so important for physics? In a truly closed system, the energy isn't lost, but simply dissolves any order within that system ie. the useful part. In order to actually lose energy, ie, drop the temperature of the entire system, it would have to radiate it out of the system, thus into an increased volume.

I don't think one can discuss energy without time, temperature, or the various dimensional descriptions of space; distance, area, or volume.

Personal note; The daughter was accepted into Johns Hopkins today. Big news around the family.

Rick,

"My approach defined differentiation [... ] with the O surface normal algebraic element divided by the enclosed volume as the volume approaches 0. This is a direct extension of the integral definition of 3D divergence, gradient and curl, [...] understanding the differential operator is an algebraic element, and its application is effectively a multiplication governed by the algebra."

Having studied the Arfken reference you earlier pointed me to I understand what you're saying, and once again thank you for the insight.

Edwin Eugene Klingman

Hi Michael,

Let us follow your logic of determining number of dimensions by identifying the "redundant" dimensions in the algebras R, C, H, and O. As is well known, C, H, and O can be constructed from R by the Cayley-Dickson doubling process:

C = R R i,

H = C C j,

O = H H h,

where i and j are the unit imaginaries appearing in quaternions

q = w i x j y k z

with k = ij, and h is a new unit imaginary satisfying h^2 = -1 and anti-commuting with i, j, and k. The basis { 1, i} of C is thus complemented to a basis { 1, i, j, k } of H = C C j with k = ij; and similarly the basis { 1, i, j, k } of H is complemented to a basis { 1, i, j, k, h, ih, jh, kh } of O = H H h. Thus O is spanned by one scalar belonging to R and 7 imaginaries i, j, k, h, ih, jh, and kh.

Let us now apply your logic of counting dimensions. There appears to be only one real basis element belonging to R shared by all division algebras---so that is one real dimension. Then a total of 7 imaginary basis elements, with i belonging to C, H, and O; j and k belonging to H and O; and h, ih, jh, and kh belonging to O---so that is 7 distinct imaginary dimensions. This gives a total of 8 dimensions.

My question to you then is: Why are you not considering a unified theory based on S8 rather than S12 ??? According to your logic you have four redundant dimensions in your theory.

Best,

Joy

Hi Michael,

I am sure you recognized the illogic of your dimensions counting from my previous post, but just in case you missed it, let me reiterate that just as R = { 1 } occurs 4 times in the 15 dimensions of the algebras R, C, H, and O, the complex C = { 1, i } occurs 3 times, once in C, once in H, and once in O; and the hyper-complex H = { 1, i, j, k } occurs twice, once in H and once in O.

So just as over-counting of R reduces the total dimensions by 3 giving 15 - 3 = 12, the over-counting of C reduces the total dimensions by further 2 giving 12 - 2 = 10, and the over-counting of H reduces them by yet another 2 giving 10 - 2 = 8. Thus, no matter how you count the dimensions your way, your logic dictates that your theory should have been based on S8 instead of S12.

The broader conclusion here is inescapable. Either you embrace the 8D octonion approach of Rick's work (and my work on Bell) if you want to maintain your logic, or you acknowledge the absurdity of your dimensions counting and embrace the full force of division algebras encapsulated in S15.

It is either 8 or 15. There is no justification for 12 or 11.

Best,

Joy

Hi Michael,

"Time, space and mass - the things of the fundamental unit system - can be dumped in the metaphysics bin, which cannot be directly derived in physics without effectively assuming them in some form to start with."

Exactly so. I think most people, who muse on creation and their place in it with benefit of mathematics, have developed a kind of intuition for what is created from time and space alone. These can only be metaphysically real, i.e., independently objective though fundamentally "distant."

"I've experienced the same thing in Tai-Chi and rock-climbing, where the extra information you take in without the filtering is a definite aid in attempting to evade the downside to gravity."

I was also involved in an Eastern form of martial arts some years ago, and understand the sense of immediacy. I think perhaps, as you mention it, the training may have contributed to my recognition today of how information is networked continuously to a single source of task management that manifests to the agent as a (locally real) continuous range of variables.

Side note to John: congratulations to your daughter.

All best,

Tom

On the space-time split and 11D

There is an overwhelmingly good justification for: a space-time split, a space-extra dimensions split and 11 dimensions - the experimental evidence of physics.

1) There-exists over a century of experimental evidence for a split between space and time. The last physicists to think that they had discovered superluminal travel was possible were sacked because it turned out that they had a cable loose - no great surprise to me.

2) Extra dimensions can successfully unify particle forces with the force of gravity in extensions to General Relativity, where the success of GR is describing gravity gives it the status of a physical theory. The dimensions have to be compactified to get this effect, but also because there is no experimental evidence for macroscopic extra dimensions.

3) The particle charge count explaining the table of the experimentally discovered particles is - 3 colour 3 isospin 1 hypercharge = 7. By Noether's theorem, a conserved charge is associated with a continuous symmetry, and each extra dimension would give one extra symmetry. Hence minimum number of extra dimensions = 7.

The experimental evidence supports the conclusion that there-exists a minimum of 11 dimensions, which is why most extra-dimensional theories have arrived at 11: not orthodoxy, it's the conclusion from the physical evidence. For physical space being a manifold of S3, S7 in a physical GR theory, the chiral Higgs vacuum and the correct table of particles (S0) are derived - Witten was wrong about KK-theories because he didn't consider a closed universe. In GR, the dynamics of this closed universe is necessarily cyclical S1. The dimensional reduction of the extended GR derives 4D GR and the quantum field theory of the Standard Model. This is a physical theory as much as GR and the Standard Model are. Note that QFT is derived within my theory, and thus ALL QT predictions are also prediction within the scope of my theory - including ALL the spin correlation results, without exception. If QT predicts it, then so do I, because I predict QT. Thus ALL the experimental evidence of physics fits with the physical manifold of the universe being S0, S1, S3, S7.

Mathematically, this S0, S1, S3, S7 corresponds to the closed spaces in R, C, H, O and has dimension 11 - the justification for this is physics. In my book I ended the chapter with the conclusion that this "leaves the search for the unification of physics without arbitrary fields with nowhere left to go". In this year, nothing has changed - still true.

If a maths theory fails to produce the 3 features given above, then it just isn't physics - end of story. All of physics doesn't fit into 8 dimensions. No space-time split, then it's not physics. No distinction between spatial dimensions and extra dimensions, then it's not physics. I make no apologies for abiding by the old fashioned physics standard of physical evidence. I know this goes somewhat against the ideology of the last 40 years where Maths was assumed to trump Physics, but that route has proven to be a failure. Super-symmetry - dead, string theory - dead. In reality, Physics trumps Maths.

Michael

Hi Joy,

The S15 scenario has potential precisely because it includes the S0, S1, S3, S7 which shows agreement with the physical evidence, ie. it includes the physical 11 dimensions that I gave the basis for above. The issue between us is whether the extra 4 dimensions are real physical dimensions or not. If they are 4 extra macroscopic dimensions as you think, then your classical physics rotation correlation experiment would find strong correlations - the extra 4 of S15 give the same extra 4 of your spatial S7. If the experiment fails to find these, then your physical interpretation of your results must be incorrect, and the extra 4D aren't macroscopic.

As I discussed earlier, there are good reasons to doubt these extra dimensions from the QFT and particle physics perspective. The particles of an EPR state are necessarily charged - the neutrino correlations are flavour correlations between left-handed particles, not spin correlations of a spin singlet state. The S1 of electromagnetism is embedded within the S3 of isospin and S1 of hypercharge, which I show can successfully be embedded in an S4 electroweak basespace of a full S7. The condition of no charge/no spin correlation, together with this S4 in addition to the spatial S3 raises doubts that your S7 is fully spatial, with 4 extra spatial dimensions.

The existence of spurious mathematical degrees of freedom occurs in physics, and gives rise to spurious features in theory that don't show up in reality. The classic example in QFT is Fadeev-Popov ghost particles. Gauge theories are about the relative gauge rotation between particles, which leaves the initial setting of the gauge rotation as being arbitrary. In abelian QFT, you can just set the initial gauge and that's that. But this isn't possible in non-abelian QFT, and when the quantisation condition is imposed upon the theory this arbitrariness of initial gauge rotation is quantised as particles - the Fadeev-Popov ghosts. These are called ghosts because they are a figment of the QFT calculation only, they never appear as external lines in Feynman diagrams and don't exist in reality.

I see the same sort of thing being present within S15. The extra 4 dimensions are only mathematical in form, and don't correspond to physical dimensions - namely the 11D of S1, S3, S7. In this respect, I see the extra 4 dimensions are in effect being ghost-dimensions, corresponding to extra degrees of freedom within the maths that don't match reality. I have this view because the sedenions aren't a normed division algebra, and because of the success of S0, S1, S3, S7 in accounting for the evidence of physics - solely in 11D.

The presence of QT correlations in your rotation experiment would be the first experimental evidence that these 4 dimensions are real. Unless and until that, the physics says that they are ghost-dimensions at best, or S15 is totally spurious. However, S15 is still the last word in sphere nesting, and does contain the S1, S3, S7 which is compatible with the physical evidence.

Best,

Michael

Hi John,

On space being implicit in the definition of entropy, you make a fair point. It just shows how difficult it is to give definitions without implicit dependences. The idea that "entropy is the amount of unusable energy in a system" is itself a meaning derived from the definition of temperature. The best starting point for entropy is the statistical mechanics approach, where entropy is basically defined to be the logarithm of the multinomial coefficient for the number of ways of distributing M objects into N bins. It is the generality of this definition of entropy that makes it so prevalent throughout physics, and information systems. For this entropy definition to apply to reality, the N bins must be arranged in some volume of space. So even an apparently maths definition without explicit spatial reference in it, nonetheless has an implicit spatial reference when it is applied to reality.

This illustrates just how the quadruplet (causation, time, space, event) implicitly sneaks into the definitions of physical quantities and concepts. The definition of one of the quadruplet isn't possible without implicit dependence upon the same quadruplet.

Michael

Hi Michael,

Thanks for the summary. In your post addressed to me you have correctly identified the point where we disagree. But in the post just above that one you wrote:

"...there is no experimental evidence for macroscopic extra dimensions."

Well, the evidence is in the eye of the beholder. To my eye there is overwhelming experimental evidence---namely the routinely observed quantum or strong correlations---which can be explained local-realistically ONLY by recognizing that there are 4 "hidden" and 3 manifest macroscopic dimensions of the physical space, constituting the total of 7 dimensions. If one sticks to 3 macroscopic dimensions only, then there is absolutely no way to explain the strong quantum correlations local-realistically. Thus any physical theory based on only 3 macroscopic dimensions must acknowledge the magic of non-locality in the world, just as Bell claimed. So the choice is between 4 hidden, macroscopic extra dimensions, or manifestly non-local physics in which my choice of raising my arm over here could have an instantaneous effect somewhere in the remote parts of the universe. 4 macroscopic extra dimensions or magic, there is no other way out of it.

The above of course does not exclude the possibility of any number of compactified extra dimensions, such as the 7 in your theory. I have no doubt that with 7 compactified extra dimensions your theory predicts ALL of the QT predictions --- including ALL the spin correlation results, without exception. The only trouble is that your theory is then necessarily non-local in the sense claimed by Bell, in the same manner that orthodox quantum theory is non-local. Thus if your theory indeed predicts absolutely everything QT predicts, then it also predicts non-locality. This is way I prefer to call your theory NonUP --- or Non-locally Unified Physics.

To my mind there is a beautiful way out of the non-local magic of your theory, which is also at least one way forward for my non-relativistic framework to become relativistic. That beautiful way lies in S15.

On the other hand, I do appreciate your point about the possibility of the extra dimensions being "ghost" dimensions, and I agree with you that the presence of quantum correlations in my rotation experiment would indeed be the first experimental evidence that the extra dimensions in question are real. That is why I have invested so much in that experiment, against almost universal scepticism.

Best,

Joy

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Michael,

On space-time split, meaning a split signature, not a distinction between time and spatial, I see your response as answering my question as yes, it is orthodoxy driving your stated acceptance of space-time split signature.

Your 1): orthodoxy on previously applied math used to describe the experimental data without any attempt to demonstrate if and only if, non sequitur on the error

Your 2): aligned with the orthodoxy of GR, where intrinsic curvature has never been shown to be necessary for the description of gravitation.

Your 3) non responsive to the question at hand

The remainder could be written perhaps more accurately without a space-time split, and if included, begs the question on S^n radii being represented as positive definite being in conflict with the assumption. Perhaps you should directly address this to clear things up.

Not space-time split - not physics, sorry but not my opinion. Frankly, other than following orthodoxy, I see no reason for it in your work. But you know your work better than I do, which is why I ask. Whether or not is is a requirement is a very important question, also why I ask when someone like you demands it.

Rick

Further to my post above: To my mind the strongest evidence in favour of sedenions in the present context is that they permit creation ex nihilo:

zero = [ a non-zero ] x [ a non-zero ].

Something out of absolutely nothing!

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Hi All,

It is easy to see in Joy's macroscopic model that the radius of the sphere is equivalent to time. When I said divide by c above, that would only be for photons in an EPR scenario. In an EPR-Bohm scenario, time from creation to detection would be divide the radius by the magnitude of the particle velocity.

I suspect the S15 topology is compaticified relating to Michael's particle "space". And the extra dimensions of it don't exist macroscopically. I will explain more later.

Best,

Fred

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Hi Joy,

Here is something from Tony Smith titled "Why not Sedenions?". It is quite lengthy but make sure to scroll to the bottom to where he answers the question.

Ok, have to go do some work for awhile.

Best,

Fred