Notes for
Complex Methods, the fourth lecture in the series
Representation Theory and the X-ray Transform, given
on 10th November 2009 in Armidale.
It was based on a series of three lectures given at the Czech Winter
School on Geometry and Physics in January 1996 held in Srni, Czech Republic.
Complex methods in real integral geometry
A pdf file for the article published in the
the Proceedings of the Winter School.