How does the steady state theory of the origin of the universe differ from the big bang and oscillating theories?

The big bang is the theory that describes how the universe emerges, it tells us that in the beginning all the space was contained in a space that was too small, and from there, it expanded rapidly until it reached the state of the universe that we know today, and that continues in expansion.

The theory of the oscillating universe describes a universe that begins and ends cyclically, it  beging with something like the big bang, end ends in what is known as the big crunch, and so on. It says that the universe did not have a beginning but has always been restarting.

The theory of the static  or steady state universe describes a type of universe uniform in space and time. And in which the universe has always remained the same regardless of where it is observed, wich is different from the other theories since the big bang theory says the universe had a beginning. In this theory it is claimed that the universe is homogeneous and isotropic. This theory is not very popular today.

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