The symmetry of the Universe

Are you thinking about "Susy".
If it is valid the Universe is somewhat dependent but I think its a little up in the air, certainly the last time I looked susy was not looking good.
But if valid ....well there is your answer.
Alex
 
river said:
Is symmetry basic to the Universe ?
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When I say no symmetry at the heart of the universe, my view is based on the concept that there was no beginning, i.e. everything has always existed. I don't subscribe to a basic symmetry because that type of symmetry only seems "necessary" for a universe that has a "something from nothing" beginning.

It is like saying that if zero represents nothing, and if you can't get 1 out of zero unless you say 1-1=0, you have a basis for symmetry. For every +1 in the universe there has to be a -1, meaning the universe is a zero sum game.

That necessary symmetry is not basic to a universe that has always existed; you can then have a 1=1, and no need for everything to have a "minus" counterpart.
 
“A thing is symmetrical if there is something you can do to it so that after you have finished doing it, it looks the same as before.”

Hermann Weyl
 
From wiki.
Symmetry (from Greek συμμετρία symmetria "agreement in dimensions, due proportion, arrangement")[1] in everyday language refers to a sense of harmonious and beautiful proportion and balance.[2][a] In mathematics, "symmetry" has a more precise definition, that an object is invariant to a transformation, such as reflection but including other transforms too. Although these two meanings of "symmetry" can sometimes be told apart, they are related, so they are here discussed together.

Mathematical symmetry may be observed with respect to the passage of time; as a spatial relationship; through geometric transformations such as scaling, reflection, and rotation; through other kinds of functional transformations; and as an aspect of abstract objects,theoretic models, language, music and even knowledge itself.[3]
https://en.m.wikipedia.org/wiki/Symmetry
 
symmetry:

the quality of being made up of exactly similar parts facing each other or around an axis.
correct or pleasing proportion of the parts of a thing.
similarity or exact correspondence between different things.
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The Universe/spacetime is said to be homogeneous and Isotropic over large scales.
Obviously the Universe was not symmetrical from the first instant post BB, otherwise we would not be here.
There was obviously a slight excess of matter over anti matter.
But worth noting that if it was the other way round, that is, more anti matter, we would still be here. Although what we call anti matter now, would be matter, and what we call matter, would be anti matter.
 
paddoboy said:
symmetry:

the quality of being made up of exactly similar parts facing each other or around an axis.
correct or pleasing proportion of the parts of a thing.
similarity or exact correspondence between different things.
:::::::::::::::::::::::::::::::

The Universe/spacetime is said to be homogeneous and Isotropic over large scales.
Obviously the Universe was not symmetrical from the first instant post BB, otherwise we would not be here.
There was obviously a slight excess of matter over anti matter.
But worth noting that if it was the other way round, that is, more anti matter, we would still be here. Although what we call anti matter now, would be matter, and what we call matter, would be anti matter.
Click to expand...

So a balance between matter and anti-matter would destroy this Universe then ?
 
river said:
So a balance between matter and anti-matter would destroy this Universe then ?
Click to expand...
Well if it would have started out that way, we wouldn't be here anyway.
NOTE: The obvious imbalance is a problem that has yet to be solved.
 
Hmmmm.... when matter and anti-matter come in contact is this a forced contact by us or some other Natural force ?
 
river said:
No they don't .

Opposite charges attract .
Click to expand...
They certainly do.

https://home.cern/topics/antimatter
"But when matter and antimatter come into contact, they annihilate – disappearing in a flash of energy".


http://particleadventure.org/antipreface.html
Matter and antimatter
For every type of matter particle we've found, there also exists a corresponding antimatterparticle, or antiparticle.

Antiparticles look and behave just like their corresponding matter particles, except they have opposite charges. For instance, a proton is electrically positive whereas an antiproton is electrically negative. Gravity affects matter and antimatter the same way because gravity is not a charged property and a matter particle has the same mass as its antiparticle.

When a matter particle and antimatter particle meet, they annihilate into pure energy!



annhilate.jpg

 
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