Preface

We would like to express our sincere thanks to our very good friend and leader Professor Paul L. Butzer for his continued support of our Journal and the sampling group. As he is trying to reduce his load of reviewing for so many Journals, we are going to miss his very valuable service.

I am very thankful to my very good friends Professor Paul L. Butzer, Rowland Higgins and M. Zuhair Nashed, for writing the appreciation paper in this issue on the occasion of my seventy-seventh birthday. I cannot find words to express my appreciation for their kind thoughts of me, which I shall cherish for as long as I live.