This applet solves the Friedmann equations for some example parameters.
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You should see a button to the left saying Show Friedmann window. (If not, see here.) To download, see below. |
Input the minimum a in the text field and then choose with the selector to see the evolution of a quantity in four example cosmologies.
The program is written in literate Java and is free software. The source and Java byte code are all bundled in the Friedmann.jar file.
You can run the program from a command line with
java -jar Friedmann.jar
This also lets you save output to disk.