Dating phase transition
There’s a comment and a link to a Reddit page which says Andrei Linde ascribes the inflation idea to Gliner, and which links to the paper itself: algebraic properties of the energy-momentum tensor and vacuum like states of matter. He was an insecure postdoc who’d worked on grand unification theories.He knew that GUTs predict magnetic monopoles, and he knew about the monopole problem.There comes a time in every relationship when you've been with your partner long enough to decide you're ready to take the next step.Getting serious in a relationship can be both exciting and scary as you contemplate how your relationship will change and grow.
Guth worked with his colleague Henry Tye on phase transition and supercooling and the expansion of the universe.
He gave an overview of the horizon and flatness problems and talked about the standard model of cosmology, saying the universe is assumed to be homogeneous and isotropic and described by the Robertson-Walker metric.
He also said the evolution of the scale factor R(t) is governed by the Einstein equations, he referred to conservation of energy, and he said He said the above equations must be supplemented by an equation of state for matter which can be approximated to an ideal quantum gas of massless particles.
It’s by Stuart Clark, who says Alexei Starobinsky published his theory of inflation in December 1979.
Starobinsky’s paper was Spectrum of relict gravitational radiation and the early state of the universe.
Whilst only four pages long it’s rather technical and it doesn’t use the word inflation.