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1. Equation Of State Parameter

   Linked via "cosmic energy budget"

   Cosmological Applications and Canonical Forms
   In modern cosmology, the equation of state parameter is the primary descriptor for the constituents of the cosmic energy budget. Its value dictates the expansion history of the universe, as encapsulated in the first Friedmann equation. Different forms of matter and energy possess characteristic, fixed values of $w$ under the assumption of homogeneity and isotropy described by the FLRW metric (see [Metric Ten…