I'm trying to understand what a one-parameter group of transformations really is. At one lecture I was told that they are trivial lie groups. In Arnold's "Ordinary Differential Equations" they are defined as an action by the group of real numbers; a collection of transformations parametrised by the real parameter t (time), and as being the mathematical equivalent of a two-sided deterministic process. I can more or less understand all this, but still feel some confusion. For example, is there such a thing as a two-parameter group of transformations? n-parameter?(adsbygoogle = window.adsbygoogle || []).push({});

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# One-parameter group of transformations

**Physics Forums | Science Articles, Homework Help, Discussion**