Preface

It is a pleasure to bring out this volume of contributed papers on the occasion of the retirement of Richard Wheeden. Dick Wheeden as he is known to his many friends and collaborators spent almost all his professional life at Rutgers University since 1967, other than sabbatical periods at the Institute for Advanced Study, Princeton, Purdue University, and the University of Buenos Aires, Argentina. He has made many original contributions to Potential Theory, Harmonic Analysis, and Partial Differential equations. Many of his papers have profoundly influenced these fields and have had long lasting effects, stimulating research and shedding light. In addition many colleagues and especially young people have benefitted from the generosity of his spirit, where he has shared mathematical insight and provided encouragement. We hope this volume showcases some of the research directions Dick Wheeden was instrumental in pioneering.