Can Representing Ideas be Possible?

In summary, De Sabbata and Gasperini discuss the Robertson-Walker metric, which is used to describe non-static models of the universe. However, due to the complexity of the mathematics, they find it difficult to develop the metric themselves. They go on to say that there are computer programs that can help with the computation.
  • #1
BiaCarvalho
5
0
TL;DR Summary
I was studing the FLRW metric, and I came across the fact that the field equations can be written in the form
imagem_2022-04-27_160952870.png


but I could not develop, is it really possible to represent this way?
 
Space news on Phys.org
  • #2
BiaCarvalho said:
I was studing the FLRW metric, and I came across the fact...
Where? Please give a reference.
 
  • Like
Likes Orodruin
  • #3
PeterDonis said:
Where? Please give a reference.
Introduction to Gravitation Venzo De Sabbata, ‎Maurizio Gasperini - 1985
 
  • #4
BiaCarvalho said:
Introduction to Gravitation Venzo De Sabbata, ‎Maurizio Gasperini - 1985
Which chapter/section in particular?
 
  • #5
PeterDonis said:
Which chapter/section in particular?
Chapter VII - Non-Static Models Of Universe
1.- The Robertson-Walker metric
 
  • #6
BiaCarvalho said:
I could not develop
What have you tried? The computations are somewhat tedious, but should be straightforward, since you are given the metric and just need to compute its Einstein tensor.
 
  • #7
PeterDonis said:
What have you tried? The computations are somewhat tedious, but should be straightforward, since you are given the metric and just need to compute its Einstein tensor.
I was trying to do it like in the book, applying the field equation in the first equation of the chapter, I probably got lost in the math so...
 
  • #8
BiaCarvalho said:
I probably got lost in the math
If you can post specific places in the math where you're having trouble, we could try to help with that. Computing the Einstein tensor of a given metric is a basic task in GR, so it's worth taking the time to work it through in detail for important cases like this one.

There are also computer programs that can help with the computation, such as Maxima.
 
  • Like
Likes BiaCarvalho
  • #9
PeterDonis said:
If you can post specific places in the math where you're having trouble, we could try to help with that. Computing the Einstein tensor of a given metric is a basic task in GR, so it's worth taking the time to work it through in detail for important cases like this one.

There are also computer programs that can help with the computation, such as Maxima.
yes yes... I'm going to do it again and switch to latex, then I'll post it here later :D
 

FAQ: Can Representing Ideas be Possible?

Can ideas be represented visually?

Yes, ideas can be represented visually through various forms such as diagrams, charts, graphs, and images. These visual representations can help to convey complex ideas in a more understandable and memorable way.

Is it possible to represent abstract ideas?

Yes, abstract ideas can be represented through symbols, metaphors, and analogies. These representations may not be as concrete as visual representations, but they can still effectively convey abstract concepts.

How can ideas be represented through language?

Ideas can be represented through language by using words, sentences, and paragraphs to describe and explain them. Language allows for the expression of complex ideas and allows for communication and understanding among individuals.

Can technology aid in representing ideas?

Yes, technology can aid in representing ideas through various tools such as presentation software, 3D modeling programs, and virtual reality. These technologies can enhance the visualization and communication of ideas.

Are there limitations to representing ideas?

Yes, there are limitations to representing ideas. Some ideas may be too complex or abstract to be fully represented through visual or language-based means. Additionally, cultural and personal biases may affect the representation of ideas.

Similar threads

Back
Top