Contents
1. INTRODUCTION 1
2. T H E ROLE OF SECOND COHOMOLOGY GROUPS 21
3. FRO M ALGEBRAIC SPLITTINGS TO STRONG SPLITTINGS 39
4. FINITE-DIMENSIONAL EXTENSIONS 55
5. ALGEBRAIC AND STRONG SPLITTINGS OF FINITE-DIMENSIONAL EXTENSIONS 79
6. SUMMARY 105
REFERENCES 107
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