the cause of differentiation

[subversion]

If we imagine the creation of the universe, matter must have been completely uniform and concentrated prior to the big bang. Then inflation happened: the uniformly concentrated matter expanded almost instantly. Then you have the first image of the universe, what we now see as the microwave background radiation, with fluctuations in matter/energy concentrations. My question then is one that puzzles scientists, how did differentiation occurr in the density of the universe? In other words, how does the universe go from being completely uniform, under uniform expansion, to not completely uniform?

[AntonioLao]

how did differentiation occurr in the density of the universe?

density like energy, mass and temperature are all scalar quantities. But the gradient of a scalar quantity is a vector quantity.

[math] \nabla \rho(x,y,z,t) [/math] is a vector, which indicates a direction of flow or a direction of change of the density function. For example, the gradient of potential energy is a force.

[Guille]

When things evolve, they differentiate. I don't know why, but nature acts like that. I can't give a scientific explaination, because I don't have enough Knowledge.

[AntonioLao]

I can't give a scientific explenation, because I don't have enough Knowledge.

When the universe makes a choice, a course of action and direction like what human beings are doing constantly.

[Guille]

When the universe makes a choice, a course of action and direction like what human beings are doing constantly.

I have a similar theory about evolution.

The basic idea is that what used to create evolution, natural selection, is becoming, at least in the world, human selection. We are in many things over nature. We can and have destroyed species, or mass-reproduced other. we are scarily and contradictory to my philosophy thoughts, to become god.

[subversion]

density like energy, mass and temperature are all scalar quantities. But the gradient of a scalar quantity is a vector quantity.

[math] \nabla \rho(x,y,z,t) [/math] is a vector, which indicates a direction of flow or a direction of change of the density function. For example, the gradient of potential energy is a force.

yes I understand this, but in the uniformly concentrated early universe there was no gradient, that's the point of being uniform.

[AntonioLao]

that's the point of being uniform

the synomyn of uniform is constant. Newton's 1st law of motion talks about uniform motion (constant velocities). In circular motions, there are constant accelerations. All linear systems imply uniformity by their constant slopes. In calculus, something is uniform if its derivative with respect to something else is constant. So, uniform can imply constant change and if this change is at the local infinitesimal region of spacetime then its degree of freedom is restricted to two degrees, which are both directions of time.

[Guille]

density like energy, mass and temperature are all scalar quantities. But the gradient of a scalar quantity is a vector quantity.

[math] \\nabla \\rho(x,y,z,t) [/math] is a vector, which indicates a direction of flow or a direction of change of the density function. For example, the gradient of potential energy is a force.

What's the diff between scalar and vector quantities? I guess I never came to them in math....Also refering to the thread, the first of all questions, about differentiation in the universe, if the fact of the big bang is used as an argument, it should be, what caused the differentiation in temperature and pressure? don't you think so? and what caused that caused them? and what caused that? ok, I think you will understand what I mean...

[AntonioLao]

if the fact of the big bang is used as an argument, it should be, what caused the differentiation in temperature and preasure? don't you think so? and what caused that caused them? and what caused that?

Not even Stephen Hawking or Roger Penrose can answer these questions. But my answer is simple, when a spacetime point made a choice at the beginning to move locally and infinitesimally traversing infinity and back at zero time in a given direction.

the different between scalar and vector is the directional property. Both scalar and vector have magnitude but only vector has a direction. Directional property of vector becomes very confusing and complex using tensor analysis, which is a multi-dimensional transformation of vectors in multi-dimensional spacetime coordinate systems.

[Guille]

subversion,

maybe the universe HAD to differentiate because it wasn't stable. that is all we can answer just now. The TOE will probably give more details.

If we introduce my photo/electro/gravitational effects/processes, then the gravitons, because of such high temperatures, moved really really fast, and as mass was equal to energy, or better said, there was no "matter", then gravitons ended up crashing between them forming my clusters. Creating electrons, photons......maybe all the particles (still not completed theory). This could be a good explaination of the differentiation.