We have the great pleasure to edit Hsus mathematicalwritings which had been published within the years 1944——2009. Professor L. C. Hsu was born in the September of1920， and has been doing and teaching mathematics formore than 60 years. A proper compilation of Hsu s papersinto 2 volumes is now first published just before the birthdate of Hsus 90 years old，so Hsu gladly asks us to conveyhis sincere thanks to the university authority of Dalian University of Technology for the effective support of publication of his mathematics works. As editors we also sincerelywish the interested readers would possibly get some imaginations as well as inspirations from some selective reading of Hsus writings.