Main Question or Discussion Point
In my general relativity course my professor actively refers to the models in the lecture .pdf I have included as "The Robertson Diagram" and "The Ω[itex]\Lambda[/itex] - ΩM Plane", respectively. I am not doubting that he is correct but I would like to do some additional reading on the subject and I am having trouble finding other resources when I search these names. If anyone knows other names that these types of plots go by or resources which explain them I would greatly appreciate it if you could share your knowledge, thank you.
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