Fluctuations at low temperatures

The London prize committee cites a number of my works under the common term 'fluctuations'. Research under the general heading of 'fluctuations' has followed a different course during different periods of my life. I am deeply indebted to many people who have contributed to and participated in the research projects that have been cited; among them there were my professors and my students. I would like to acknowledge them and to talk about these people in conjunction with the physical problems on which we worked, stressing that for me these people, their personality and my intellectual activities were inseparable. (orig.)