The discussion centers around the concept of e-folds in cosmology, particularly how it relates to the expansion of the universe. Participants explore the definition of e-folding, its application in measuring cosmic expansion, and the implications of using logarithmic measures in this context.
Participants express differing views on the interpretation of logarithmic expansion, with some seeking clarification on its implications while others emphasize the utility of e-folds without asserting a specific nature of expansion.
There are unresolved questions regarding the interpretation of "logarithmic expansion" and the assumptions underlying the use of e-folds in cosmological models.
I am just trying to work out how scientist discovered that the universe expanded logarithmic ally.bapowell said:An "e-folding" is just an increase by a factor of e, the base of the natural logarithm. In cosmology, we often speak of e-foldings of expansion as a means of quantifying the amount of expansion before or after some event (e.g. the number of efolds before the end of inflation is a common time coordinate in inflation calculations). What specifically did you have a question about?
What do you mean by "expanded logarithmically"? The use of the e-fold as a measure of the amount of expansion should not be taken to imply anything about the nature of the expansion. Since the universe has gone through many, many near-doublings in size since its beginning, the use of a logarithmic measure for the amount of expansion is especially convenient.wolram said:I am just trying to work out how scientist discovered that the universe expanded logarithmic ally.