Bücher von S. K. Jain

This volume is an outcomeof invited lecturesdelivered at the Ring Theory Section of the 23rd Ohio State-DenisonConferencein May 1996. It also contains articles by some invited mathematicianswho could not attend the conference. These peer-refereedarticles showcasethe latest developmentsand trends in classicalRing Theory, highlighting the cro- fertilization of new techniquesand ideaswith the existing ones. Providing a wide variety of methodologies,this volume should be valuable both to graduatestudentsas well as to specialistsin Ring Theory. We would like to thank our colleagueswho investeda lot of their time to make the conferencea great success. In particular, our thanks go to ProfessorsTom Dowling, Dan Sanders,SurinderSehgal,Ron Solomonand Sergio R. L6pez-Permouthfor their help. The financial support for the Conference,provided by the Departmentof Mathematics,The Ohio State University, and MathematicsResearchInstitute, Columbus, is gratefully acknowleged. Many thanksgo to Dean Violet I. Meek for her commitment to the promotion of researchby her continuousencouragement of such efforts and for providing financial support from the Lima campusof The Ohio StateUniversity. We havereceivedimmensecooperationfrom all the refereeswho, meticulouslyand in a very short time, provided us with their reports in spite of their busy schedules. We expressour sincerethanks to all of them. Finally, we thank Ms. Cindy White for her excellent job in typing parts of this volume. We are pleasedto dedicatethis volume to ProfessorBruno J. Miiller on the occasionof his retirementfor his many contributionsto the Theory of Rings and Modules. As this volume was going to presswe have learned that ProfessorCarl Faith is retiring this year.

The Indian Diaspora today constitutes an important, and in some respects unique, force in world culture. Numerically they form third largest Diasporic community in the world, only next to Chinese and British. Over 24 million Indians have their presence in all corners of the world. It will not be an exaggeration to say that ';sun never sets in Indian Diaspora'. Though, they migrated in different capacities and in different busts and do not form a homogenous community. However, a sense of common belongingness always binds them with their motherland. In the era of globalization, a new relationship has emerged between the motherland and the overseas Indians. They have emerged as dynamic factors shaping the relations between the host and mother land. The present volume is an outcome of a seminar on ';Indian Diaspora in the era of Globalization: Implications for India'. Fourteen papers of the volume addresses variety of the aspects pertaining to Indian Diaspora under three broad categorizes- (1) Theoretical Perspectives, (2) Sub-national Identities and (3) Regional Dynamics. This book has tried to look into different dimension of' Indian Diaspora' for a general understanding of the people from all walks of life besides those who are in research and teaching in this area.

However, for a successful approach to the induction problem a thorough understan ding of various pathways that bring about pollen abortion in naturally occurring cases, would be of great value.

Some of the main problems in this field concern with the development of hybrid varieties, improvement of autotetraploid fertility, use of best pollina tion procedures to obtain highly self-fertile lines and the transfer of rye characters to wheat as such or in the form of amphiploid Triticales.