A simple derivation of cosmological formulas

[spoirier]

Hello. I just added to my site a simple reasoning that quickly justifies the basic formulas of cosmology in General Relativity (Friedmann differential equations, assuming homogeneity and so on, including the role of the cosmological constant), without any heavy formalism (only assuming basic properties of curved geometry and mechanics):
http://settheory.net/cosmology
If you find any error, or if you have a better notation to suggest, please tell me; if mentors think it can be suitable to include in the list of Advanced Physics Learning Materials, please do. Thanks.

 

[AndyW]

Thank you for sharing your website and reasoning on the basic formulas of cosmology in General Relativity. I am always interested in exploring different perspectives and approaches to understanding complex concepts.

After reviewing your website, I have a few suggestions and comments. Firstly, while your reasoning may be helpful for those with a basic understanding of curved geometry and mechanics, it may be difficult for those without that background to fully grasp the concepts. It may be helpful to include some introductory material or definitions to help readers follow along.

Secondly, I noticed that you did not mention the role of dark matter in cosmology. As you may know, dark matter is a major component of the universe and plays a crucial role in shaping its structure. I suggest considering incorporating this concept into your reasoning.

Lastly, I believe your website could benefit from some visual aids, such as diagrams or animations, to help illustrate the concepts you are explaining. This could make the material more accessible and engaging for readers.

Overall, I think your approach to explaining the basic formulas of cosmology is interesting and has potential. I encourage you to continue developing and refining your reasoning, and I am sure it will be a valuable resource for those interested in this topic.