Freeman

Well...maybe an institute of technology would be up your alley. Maybe Georgia or Illinois IT?

Can a vector be a wave? Or does the wave need to be a number of vectors?

What's your GPA? What atmosphere would you like? Do you want higher education?

Well, I can get the motherboard used, I can get mathematica from my friend, and I can use...uh...Linux for the os.

 

Wait...why don't I just load mathematica onto a palm pilot do-higgy?

Well, wouldn't a USB hardrive work? And I wouldn't need a fast processor, or much RAM. Wouldn't it be more along the lines of a subpar handheld computer?

 

But what about graphics?!

I was discussing with my dad and brother about graphing calculatros when my bro suggested that parts are so cheap that I might as well just build a calculator. Well, I have been thinking about this but does anyone have any suggestions or experience in this field?

Thanks for all the help everyone, its great stuff.

 

I know this sounds stupid, but what do you mean by "graph out" ?

Given a rank two tensor, and -say- cartesian coordinates, how would one go about to put the matrix on the coordinates?

Thanks...I have a few questions.

 

Is there any real difference between covariant and contravariant tensors other than they are using different scripts?

 

I know this one is stupid, but can you graph out a rank 2 (or any other higher ranked) tensor? How?

 

Are tensors just extensions of the Jacobian?

OK, after reading books on linear algebra, and vector calculus, I have come to tensor transformations. Huzzah!

 

However, I do not have any book to study from(!) so I am rather "sol". I do understand that covariant tensors have subscript lettering and contravariant tensors have superscipt lettering. How do I transform a given vector in covariant and contravariant tensor transformations?

 

I googled it and there were a number terrible websites. Any help would be great!

Well, isn't the critical density 10^-36 kg (or about that)? Plug this in for the equations involving the mass of the universe divided by its size (supposing its a sphere) that Einstein gave us (with the cosm constant). We can therefore deduce that the universe will expan to be about 9.5*10^22 km in its radius. Huzzah!

 

But you can't travel there, spacetime will conform itself. Remember, nothing is outside the universe! Its like a fish trying to swim out of a bag but the bag distorts itself to allow the fish to continue swimming.

Hello, I want to solve Einstein's field equation but I need a little help. First I don't quite understand or appreciate the Ricci tensor, or the concept of tensors at all. I have learned vector calculus, on the one hand, but that really doesn't help (on the other hand). Any help would be greatly appreciated!

Does a "lay person" know the math of vector spaces, matrices, and (scalar and vector) calculus ?

All of it but vector calculus.

Does anyone know a good book for lay people on tensor calculus? I have tried reading a grad book on it and it was focused primarily on the algebra of tensors...rather disappointing really.

 

Or, on the other hand, does anyone know tensor analysis? I have tried googling it several times.

Build a nuclear reactor using only class materials...that'll get you an A!

 

Or do cold fusion, that's pretty impressive too.

Does anyone remember these things from school? How reliable are they, or are they as flawed as IQ tests? If some are reliable, are any of them online?

Is there a good 3 dimensional (cartesian coordinate system) graphing calculator online anywhere? Again I have tried several times but couldn't find anything free AND good...

I need to find the equation describing ripple mechanics in three dimensions for a question along the lines of "If Jon throws a rock weighing 100 kilograms into a lake, what would the ripple effects be?" I have googled it several times with many different parameters but I couldn't find anything, so I came here...

That answers my question. Thanks for the help!

I have a quick question about the curvature of space-time equation, well two questions.

 

1. What is "k" on the right hand side of the equation (the equation I am referring to is the curvature tensor equals eight pi multiplied by "k" multiplied by the stress energy tensor).

 

2. What is the stress energy tensor?

 

I know the second question is really an uber-simpleton one, but it's been on my mind for a while now...

First of all, the eigenfunction is a problem for me. The books I have do not describe the function whatsoever(!), does anyone understand it?

 

Secondly, is Schrodigner's equation only for the electron or for any particle?

Where I found it was here. I really have no clue what it is.

So, my econ book explains that I should use a input-output matrix for a specific situation...but what the devil is a "input-output matrix"?

I need some economic data! So anyone's help is greatly appreciated! What I need is the stats for the England, France, Germany, Japan, and America. But if you could find it for China, Spain, Portugual, Argentina, Venezuela, Russia, and Mexico that would help a lot! What I need is:

• Output of Coal
  
• Output of pig iron
  
• Output of steel
  
• Output of corn and grains.
  
• Output of textiles.
  
• The length of rail ways and freeways
  
• The number of bank accounts(for each nation) and the sum of money deposited
  

I need it for the past 20-30 years. Thanks for any and all help!

OK, so I have several questions...

 

First, a differential is a tangent to the curve and the integral is the area between the curve, X axis, and differentials...right?

 

Second, if I have [math]y=mX^n + b[/math] it would be: [math]y=(mn)X^{n-1}[/math] for a differential, right? And [math]y=(m/n)X^{n+1} + b[/math] for an integral...right?!

FOX news is a joke, they'll put anything on their news("The moonlanding is a hoax!")